Samurai Jack- Aku Upgrade's Part 3

[Eneseditzm0]

I have prepared an incomplete hax revision for Aku, the most iconic villain of Cartoon Network and the Samurai Jack universe, and without further ado, let's get started.

Haxes

Life Manipulation: He gives life to his servants, whom he created from darkness

Surface Scaling: Aku can climb walls

Restoration Aku restores Scramouche's body after it was destroyed by Jack

Non-Standard Breathing (Type 2):Aku can breathe comfortably underwater

Animal Manipulation:Aku transforms animals to attack Jack and makes them do his bidding

Smoke Manipulation:Aku can turn into smoke

Subjective Reality:Aku uses Jack's hatred to transform the Search tablet into Jack's dark side

Information Analysis:Aku carefully examines Jack's soul and creates Mad Jack, a perfect match for him.

Power Bestowal:Aku gives his Dark powers to the robots he gives them. He also gives Ashi her own powers thanks to her Darkness

Voice Mimicry:Aku imitates Jack's voice perfectly

enchanced mind manipulation:Despite the Scotsman's resistance to the mind manip,Aku was able to take over his mind

Construction:Aku can build a castle for himself

Morality Manipulation:When Jack is exposed to Aku's essence, his morality begins to deteriorate due to Aku's essence

Unholy Manipulation:Aku is an entity opposite to the gods, he has demonic powers, the dark essence that Aku also has can harm the sacred gods

Supernatural Willpower:He is able to continue fighting despite his body being almost completely destroyed by Jack

Pain Manipulation:Aku sends his victims to the pit of hatred to torture and punish them

Stealth mastery:Transforming into Ikra, he enters her side and uses her for his purpose Possible Uses:Successfully adopting the role of others or entirely new personas

Vibration Manipulation:Aku creates vibration with his shout

Bone,Magma,Water,Sand,Ice,air,plant Manipulation:Aku created these with the pocket reality created.

Hacking:He gave his essence to the ultra robots and took Extor's robots under his control, they all came under Aku's control

Horror Manipulation:Even though Aku changed his shape and acted like a good person, the animal was afraid of him.

Immortality tip 6:Aku deposits a part of himself into a host body when necessary

Additional Limbs:Aku can do this because he has full control of his body, and has grown additional limbs by changing the shape of his body many times.

Limited Invulnerability:As Aku has said many times in the series, he is invincible and invulnerable except for the divine powers and the mystical weapons and mystical beings made with him, this has been shown many times in the series, He was shown fighting against all armies in the underwater fight and in the final battle.

 

[Ultimate-Rex1]

enchanced mind manipulation:Despite the Scotsman's resistance to the mind manip,Aku was able to take over his mind

More like 1 layer (Good hax)

 

[Ultimate-Rex1]

Bone,Magma,Water,Sand,Ice,air,plant Manipulation:Aku created these with the pocket reality created.

This via creation, so this can't be listed separately

Implied Powers​

In case of creation of large and varied objects, such as planets, galaxies and universes, one should just list creation as ability without listing separate abilities for each created object. For example, while creation of a galaxy likely includes creation of black holes, Black Hole Creation should not be listed separately. An exception to that would be if the object in question is of particular relevance to the characters fighting style, i.e. if the character for instance launches black holes at his opponents.

 

[Qawsedf234]

Life Manipulation: He gives life to his servants, whom he created from darkness

This would not be an example Life Manipulation per the page. This is some form of creation or animation feat, but its not life manipulation based on just the scene

Surface Scaling: Aku can climb walls

He probably does have this, but to me this isn't the feat to use. You can see based on the legs and claws that he's using the saw-tooth pattern objects in the background to crawl up on and brace himself

Restoration Aku restores Scramouche's body after it was destroyed by Jack

Looks good to me

Non-Standard Breathing (Type 2):Aku can breathe comfortably underwaterhttps://youtu.be/0jKpbLnjvqA?t=4m55s

Looks good to me

Animal Manipulation:Aku transforms animals to attack Jack and makes them do his bidding

That's more corruption than animal manipulation, since he first transforms them and once they're slain they become innocent again

Smoke Manipulation:Aku can turn into smokehttps://youtu.be/oxP59lD984U?t=16m55s

I think this is fine

Subjective Reality:Aku uses Jack's hatred to transform the Search tablet into Jack's dark side

That's not subjective reality. The episode explains pretty clearly how Mad Jack was made

Jack: Who are you, and how have you come to be me?

Mad Jack: I am the son of Aku's magic. He has looked deep within you and has spawned me from your own burning hatred. I am your dark side, and I possess all the powers that you wield. And I have only one purpose in my existence... To destroy you.

This is just a creation/magic feat

Information Analysis:Aku carefully examines Jack's soul and creates Mad Jack, a perfect match for him.https://youtu.be/cJwXXpcmME8?si=Dy2An-8lgkcfrJch

Based of the users of this power Aku finding the inner darkness of Jack wouldn't qualify as information analysis. Since no scanning or type of detailed information is taken from the study. Aku just used an existing hatred to create a clone of Jack.

Power Bestowal:Aku gives his Dark powers to the robots he gives them. He also gives Ashi her own powers thanks to her Darknesshttps://youtu.be/gzUOynKu7-w?t=57s

The former isn't shown and there's better evidence of the latter. But he does have this power

Voice Mimicry:Aku imitates Jack's voice perfectly

This isn't a power

enchanced mind manipulation:Despite the Scotsman's resistance to the mind manip,Aku was able to take over his mind

This would just be mind manipulation. Though as a note the Scotsman resisted the Siren's because he found their singing to be terrible, which is why he wasn't affected by their song. Aku just sorta, attacks your mind. I'm not sure if you'd get a laired resistance here.

Construction:Aku can build a castle for himself

Needs a scan but probably alright

Morality Manipulation:When Jack is exposed to Aku's essence, his morality begins to deteriorate due to Aku's essence

This power is already covered under corruption.

Unholy Manipulation:Aku is an entity opposite to the gods, he has demonic powers, the dark essence that Aku also has can harm the sacred gods

So the main issue with this reasoning is that to my knowledge this is never showed. Being demonic =/= give you Unholy Manipulation. Additionally, whenever he encounters a holy thing Aku is steamrolled because they're divine and purify him. Its why Ra/Vishnu/Oden would've killed Aku if they fought, why the Water Goddess and his creatures beat him, and why the Divine Sword negates his powers and harms him.

Supernatural Willpower:He is able to continue fighting despite his body being almost completely destroyed by Jackhttps://youtu.be/px19BWFk8kw?t=1m25s

I'm not sure if that qualifies for supernatural willpower. Since he can shape shift, regenerate and ran away because of the damage he sustained.

Pain Manipulation:Aku sends his victims to the pit of hatred to torture and punish them

The most this would be is BFR and not pain manipulation. Pain manipulation requires directly inflicting pain on the target and not through a medium.

Stealth mastery:Transforming into Ikra, he enters her side and uses her for his purpose Possible Uses:Successfully adopting the role of others or entirely new personas

Nothing in that video shows Stealth Mastery. They were even caught by guards at one point.

Vibration Manipulation:Aku creates vibration with his shouthttps://imgur.com/a/pbHGMSV

Looks fine

Bone,Magma,Water,Sand,Ice,air,plant Manipulation:Aku created these with the pocket reality created.

This falls under general creation and wouldn't be an individual manipulation aspect unless he directly controls them.

Hacking:He gave his essence to the ultra robots and took Extor's robots under his control, they all came under Aku's controlhttps://youtu.be/Q8FcxTVi8eM?feature=shared

This would be corruption again

Horror Manipulation:Even though Aku changed his shape and acted like a good person, the animal was afraid of him.

This would be fear manipulation and a small animal sensing Aku's true presence and running away isn't really an aspect of Fear Manipulation. Small animals will run and hide from danger no matter what.

Immortality tip 6:Aku deposits a part of himself into a host body when necessary

This is just corruption. This is only immortality if you could show that he could survive through this method after his main body is destroyed.

Additional Limbs:Aku can do this because he has full control of his body, and has grown additional limbs by changing the shape of his body many times.

I think this falls under his shapeshifting power. But noting it doesn't hurt I guess.

 

[Eneseditzm0]

This would not be an example Life Manipulation per the page. This is some form of creation or animation feat, but its not life manipulation based on just the scene

Fair

He probably does have this, but to me this isn't the feat to use. You can see based on the legs and claws that he's using the saw-tooth pattern objects in the background to crawl up on and brace himself

This is just an example, aku definitely has this

That's more corruption than animal manipulation, since he first transforms them and once they're slain they become innocent again

This will be animal manipulation and also corruption type 1

That's not subjective reality. The episode explains pretty clearly how Mad Jack was made

In fact, if you look at the scene, Aku's spell coming to the search tablet goes out from the tablet. Aku created it in a way that draws power from Jack's hatred. When Jack's anger resolved, he caused Madjack to disappear. In other words, he brought the Jack in the tablet to reality and made it exist. used jack's anger

Based of the users of this power Aku finding the inner darkness of Jack wouldn't qualify as information analysis. Since no scanning or type of detailed information is taken from the study. Aku just used an existing hatred to create a clone of Jack.

We see that Mad Jack Aku examined the depths of Jack's soul and created him completely equal to him. He stated that he is equal to all the powers you already have, so Aku examined the depths of Jack's soul and created Mad Jack equal to him.

The former isn't shown and there's better evidence of the latter. But he does have this power

This was just a bad example, in fact he already gives physical power to everyone he gives his essence to and gave Ashi some of her own powers too.

This would just be mind manipulation. Though as a note the Scotsman resisted the Siren's because he found their singing to be terrible, which is why he wasn't affected by their song. Aku just sorta, attacks your mind. I'm not sure if you'd get a laired resistance here

The Scotsman has previously resisted a mind manip that almost everyone is mentally affected by, this means he can resist mind manips and Aku taking over his mind becomes an enhanced mind manipulation or (layer) mind manipulation

Needs a scan but probably alright

There isn't much evidence with this scene, but he can create buildings and structures like Jack did when he captured his father.

This power is already covered under corruption

In fact, this morality is happening in Manipi because Aku had not yet captured Jack and Jack realized that his behavior was deteriorating.

So the main issue with this reasoning is that to my knowledge this is never showed. Being demonic =/= give you Unholy Manipulation. Additionally, whenever he encounters a holy thing Aku is steamrolled because they're divine and purify him. Its why Ra/Vishnu/Oden would've killed Aku if they fought, why the Water Goddess and his creatures beat him, and why the Divine Sword negates his powers and harms him.

Aku's powers can damage gods that contain holy power, Black Mass is physiologically the same as Aku, so both are the same darkness, but Aku is just a weaker incarnation of it. Despite the holiness of the Gods, Blackmass could damage them, and the fact that holy power is required to affect Aku supports this issue.

I'm not sure if that qualifies for supernatural willpower. Since he can shape shift, regenerate and ran away because of the damage he sustained

Even though Aku's structure is different, he can really resist this.

The most this would be is BFR and not pain manipulation. Pain manipulation requires directly inflicting pain on the target and not through a medium.

There are profiles that get this ability like this, Aku sends it to the person to make them suffer and receives it, Many of his skills would make Aku get this anyway.

Nothing in that video shows Stealth Mastery. They were even caught by guards at one point.

It definitely fits the possible usage, when Aku actually turned into Ikra he hid his identity tremendously and successfully played a character he made up.

This would be corruption again

it would be both

This would be fear manipulation and a small animal sensing Aku's true presence and running away isn't really an aspect of Fear Manipulation. Small animals will run and hide from danger no matter what.

this was just for example and if you look at the scene jack is not scared when he gives it but he realizes the evil and scary nature of aku and gets scared, this can be exemplified differently by all the kids who are scared of aku and the old people who know the scary nature of him

This is just corruption. This is only immortality if you could show that he could survive through this method after his main body is destroyed

this is probably immortality tip 6 taken

think this falls under his shapeshifting power. But noting it doesn't hurt I guess

Aku definitely has this and has used it many times when he changed form

-Also, I forgot to add Limited invincibility, check that out too

 

[Qawsedf234]

This is just an example, aku definitely has this

I agree, you'd just need to find another scene that showcases it better.

This will be animal manipulation and also corruption type 1

I don't see animal manipulation. Powers to be granted must be a direct cause of an effect rather than an indirect cause that comes later.

So if it went Control -> Corruption -> Monster that would count for both. But it goes Corruption -> Monster -> Control, which means the control is a byproduct of another power.

In fact, if you look at the scene, Aku's spell coming to the search tablet goes out from the tablet. Aku created it in a way that draws power from Jack's hatred. When Jack's anger resolved, he caused Madjack to disappear. In other words, he brought the Jack in the tablet to reality and made it exist. used jack's anger

None of that is Subjective Reality. It's just using a tablet as a medium to summon Mad Jack from an existing emotion.

We see that Mad Jack Aku examined the depths of Jack's soul and created him completely equal to him. He stated that he is equal to all the powers you already have, so Aku examined the depths of Jack's soul and created Mad Jack equal to him.

As I said before, no type of scanning was used to get a result. Its just Aku using a negative emotion within Jack to create a clone of Jack, but that doesn't require Aku to have Information Analysis to accomplish.

The Scotsman has previously resisted a mind manip that almost everyone is mentally affected by, this means he can resist mind manips and Aku taking over his mind becomes an enhanced mind manipulation or (layer) mind manipulation

I get how you can argue it is layered, but I'm not sure if it qualifies. The Scotsman resisted the Siren's call only because he found the music to be horrible and Aku doesn't use mind manipulation in the same fashion.

In fact, this morality is happening in Manipi because Aku had not yet captured Jack and Jack realized that his behavior was deteriorating.

Like with animal manipulation, that is a byproduct of corruption rather than an independent cause.

Despite the holiness of the Gods, Blackmass could damage them, and the fact that holy power is required to affect Aku supports this issue.

The Blackmass never damaged them, it just attempted to corrupt them. Its why as soon as the tendrils were destroyed the Gods were shown to be undamaged. I just don't think he fully qualifies without a statement, though he probably is justified for a "likely" rating of the power.

Even though Aku's structure is different, he can really resist this.

That doesn't really counter my point. He reformed his body and then ran away, so its not really super-naturally willpower.

There are profiles that get this ability like this

Those profiles are wrong

It definitely fits the possible usage, when Aku actually turned into Ikra he hid his identity tremendously and successfully played a character he made up.

The most you can argue from this is a degree of Social Influence, but this has nothing to do with Stealth in the way the wiki uses it.

it would be both

Just corruption

this was just for example and if you look at the scene jack is not scared when he gives it but he realizes the evil and scary nature of aku and gets scared, this can be exemplified differently by all the kids who are scared of aku and the old people who know the scary nature of him

Maybe those other scenes showcase that aspect, but what you linked as a small animal running away from him, which isn't Fear Manipulation.

-Also, I forgot to add Limited invincibility, check that out too

Limited Invulnerability:As Aku has said many times in the series, he is invincible and invulnerable except for the divine powers and the mystical weapons and mystical beings made with him, this has been shown many times in the series, He was shown fighting against all armies in the underwater fight and in the final battle.

I disagree pretty heavily with this. Aku's durability comes from his impressive regeneration and his various types of immortality. He can be damaged by plenty of things, one of which was a giant robot, it's just that his powers make him impossible to beat without negating them in-universe.

 

[Eneseditzm0]

I don't see animal manipulation. Powers to be granted must be a direct cause of an effect rather than an indirect cause that comes later.

So if it went Control -> Corruption -> Monster that would count for both. But it goes Corruption -> Monster -> Control, which means the control is a byproduct of another power.

So for this example we agree that it's corruption type 2 and let me give you another example of animal manipulation this one is complicated.

Aku uses an animal to take him to his destination

None of that is Subjective Reality. It's just using a tablet as a medium to summon Mad Jack from an existing emotion.

If you look at the scene, you will see this. He will bring Jack to reality there, but he creates it out of anger to be equal to Jack, that is, his existence is based on Jack's anger, if you look at the scene, we can see that he brings it out of that tablet.

As I said before, no type of scanning was used to get a result. Its just Aku using a negative emotion within Jack to create a clone of Jack, but that doesn't require Aku to have Information Analysis to accomplish.

Fair

I get how you can argue it is layered, but I'm not sure if it qualifies. The Scotsman resisted the Siren's call only because he found the music to be horrible and Aku doesn't use mind manipulation in the same fashion.

In other words, Aku has shown that he has some level of resistance to mind manipulation. It turns out that he manipulated his mind in layers.

Like with animal manipulation, that is a byproduct of corruption rather than an independent cause.

I think both will happen, it ruins Jack's morals, both of them would happen anyway, they have similar haxes.

The Blackmass never damaged them, it just attempted to corrupt them. Its why as soon as the tendrils were destroyed the Gods were shown to be undamaged. I just don't think he fully qualifies without a statement, though he probably is justified for a "likely" rating of the power.

Despite the divine energy of the gods, such a level of divine energy that could disrupt it would be opposed with unholy power. The gods had already said that Aku was not from the human world in the series, and in the 5th season they said that Aku and his men were from hell. "In that episode where the song was made for Jack" These seem at least enough for likely unholy manipulation

That doesn't really counter my point. He reformed his body and then ran away, so its not really super-naturally willpower.

So what you say makes sense, but Aku is at a level where he can resist this pain without merging his body. Yes, Aku's physiology is different, but he also gets this hax.

Those profiles are wrong

Then let me give an example for this, Aku's use of the essence inside him to capture Ashi by inflicting pain on her.

The most you can argue from this is a degree of Social Influence, but this has nothing to do with Stealth in the way the wiki uses it.

It would be either, the one on the wiki fits the possible use

Maybe those other scenes showcase that aspect, but what you linked as a small animal running away from him, which isn't Fear Manipulation.

The children were afraid of Aku despite the courage they got from Jack, until they listened to Aku's poor stories, Aku was inflicting fear on them, the old people knew Aku's destructive nature and were afraid of him, the little animal there understood with its senses that Jack was a good person and ate his bait, but as soon as he heard Aku's, it got scared and ran away.

disagree pretty heavily with this. Aku's durability comes from his impressive regeneration and his various types of immortality. He can be damaged by plenty of things, one of which was a giant robot, it's just that his powers make him impossible to beat without negating them in-universe.

It is stated in this series The only thing that can harm Aku is divine powers and the sword, Stone Samurai is something with a divine nature. This was a mythological representation. Looking at the other scenes I sent you, I can say that Aku has limited invulnerability.

Also, I have a question for you, in one episode, Aku gave power to the robots and jack destroyed the robots, jack destroyed the essence of Aku coming out of the robots with the sword and Aku felt the pain even though he was far away from them in his own castle, does this give him Extrasensory perception?

 

[Qawsedf234]

Aku uses an animal to take him to his destination

Aku levitates an animal above the water and then has that move them forward. That's just telekinesis.

He will bring Jack to reality there, but he creates it out of anger to be equal to Jack, that is, his existence is based on Jack's anger, if you look at the scene, we can see that he brings it out of that tablet.

That's not subjective reality. Like he's not turning reality into his mind, he's just conjuring a being into creation. That's just not what the power is.

In other words, Aku has shown that he has some level of resistance to mind manipulation. It turns out that he manipulated his mind in layers.

No. Aku directly attacks your mind. The Sirens hypnotize you based on finding their music good. The Scotsman resisting the latter isn't the same as resisting the former. Its why the mind control for everyone was broken once the bagpipes were played, since the music drowned out the siren's music which broke everyone's mind control.

I think both will happen, it ruins Jack's morals, both of them would happen anyway, they have similar haxes.

Morality Manipulation is the direct manipulation of morality. It's changing someone from a pacifist to a bloodthirsty warrior. That is just corruption that then induces a change. AKu's example is not Morality Manipulation because its a byproduct of another ability.

The gods had already said that Aku was not from the human world in the series, and in the 5th season they said that Aku and his men were from hell. "In that episode where the song was made for Jack" These seem at least enough for likely unholy manipulation

I'm not seeing it as more than a likely rating, but you can ask another mod to weigh in I guess.

So what you say makes sense, but Aku is at a level where he can resist this pain without merging his body.

Supernatural Willpower isn't just resisting pain, it's displaying a superhuman level of endurance or fortitude. We can read the description of the power

Supernatural Willpower is the ability to exceed one's own limits through sheer willpower to a degree extremely far beyond real human standards.

Although some characters can be considered to have a great will to achieve their goals or give their all in a fight, characters that have a willpower on this level can go vastly beyond what should logically be possible for them, with more extreme cases being able to oppose natural phenomena such as death.

Characters with this ability may be able to resist enormous amounts of pain, act even when unconscious or well beyond what they should be able to endure, resist possession and mind control, affect their environment, or even go against natural phenomena, such as death or the limits imposed by reality.

Aku just doesn't meet these markers. He gets injured, reforms himself and then runs away because he's hurt and can't win.

Then let me give an example for this, Aku's use of the essence inside him to capture Ashi by inflicting pain on her.

That example would work if it weren't a byproduct of him corrupting her. She's screaming, in pain or otherwise, because he's making her evil. Not because he's inflicting pain in of itself.

It would be either, the one on the wiki fits the possible use

It can only see it being Social Influencing and that's still a maybe since Aku is just shape shifting into a different form.

The children were afraid of Aku despite the courage they got from Jack, until they listened to Aku's poor stories, Aku was inflicting fear on them, the old people knew Aku's destructive nature and were afraid of him, the little animal there understood with its senses that Jack was a good person and ate his bait, but as soon as he heard Aku's, it got scared and ran away.

The children and the animals I don't see. The old people are the only ones who can vaguely qualify but considering how everyone can stand up to Aku by the end if there is fear manipulation it's an unease rather than a crippling effect. I don't see it though.

It is stated in this series The only thing that can harm Aku is divine powers and the sword, Stone Samurai is something with a divine nature. This was a mythological representation. Looking at the other scenes I sent you, I can say that Aku has limited invulnerability.

Divine powers negate Aku's regeneration, which is why they kill him. He can be injured or damaged by other objects, they just do nothing permanent. Its not invulnerability because things can still do damage to him, its just ineffective.

For the stone samurai it's not divine, just made by magical giants

We built Andromeda on a magical ancient city of giants... Giants that are capable of destroying the Mondo Bot.

There's nothing holy about the robot.

Also, I have a question for you, in one episode, Aku gave power to the robots and jack destroyed the robots, jack destroyed the essence of Aku coming out of the robots with the sword and Aku felt the pain even though he was far away from them in his own castle, does this give him Extrasensory perception?

That's just an aspect of his multi-selves power. All pieces are connected to him, so hurting distance pieces still hurts the main body.

 

[Eneseditzm0]

Aku levitates an animal above the water and then has that move them forward. That's just telekinesis

I couldn't put the scene enough, the animal normally doesn't,Jack uses the boat, but in order not to be understood due to the reflection of the aku, he casts a spell and makes the giant crocodile under the water fly and take it wherever he wants, because he uses this animal for his own will, it would be animal manipulation

That's not subjective reality. Like he's not turning reality into his mind, he's just conjuring a being into creation. That's just not what the power is.

This scene is probably confusing, we won't be able to agree here.

Morality Manipulation is the direct manipulation of morality. It's changing someone from a pacifist to a bloodthirsty warrior. That is just corruption that then induces a change. AKu's example is not Morality Manipulation because its a byproduct of another ability.

Yes, I understand, wouldn't this have been achieved with a haxin subgenre?

No. Aku directly attacks your mind. The Sirens hypnotize you based on finding their music good. The Scotsman resisting the latter isn't the same as resisting the former. Its why the mind control for everyone was broken once the bagpipes were played, since the music drowned out the siren's music which broke everyone's mind control.

So, isn't the Scotsman resisting the mind manipul again? Doesn't this show that Aku took it from him?

Aku just doesn't meet these markers. He gets injured, reforms himself and then runs away because he's hurt and can't win

Aku fought until he was almost destroyed and eventually escaped to protect his own empire, his actions in the swamp witch episode correspond to these.

That example would work if it weren't a byproduct of him corrupting her. She's screaming, in pain or otherwise, because he's making her evil. Not because he's inflicting pain in of itself.

Yes, you are right, would this include tying the emperor to a fiery cross for pain? In Season 5, Jack was hallucinating the cruelty committed against his father.

It can only see it being Social Influencing and that's still a maybe since Aku is just shape shifting into a different form.

Yes, by changing his shape, he almost becomes a new person and sneaks into Jack's side, suitable for this possible application, this will be both social influence and mastery of stealth.

The children and the animals I don't see. The old people are the only ones who can vaguely qualify but considering how everyone can stand up to Aku by the end if there is fear manipulation it's an unease rather than a crippling effect. I don't see it though.

Children make fun of Aku until Aku comes, in Aku's tales section, they are all very scared until Aku humiliates them, The old people are afraid of Aku, his frightening nature scares them because they know what he can do, By animal I mean the little mouse's sense

Divine powers negate Aku's regeneration, which is why they kill him. He can be injured or damaged by other objects, they just do nothing permanent. Its not invulnerability because things can still do damage to him, its just ineffective.

For the stone samurai it's not divine, just made by magical giants

In the 5th season, I think it would be supportive in this regard if Aku and his Men were described by the Emperor as coming from hell, as Aku having demonic powers, as evil that is not from the human world, and as an evil that must be destroyed by the gods.

That's just an aspect of his multi-selves power. All pieces are connected to him, so hurting distance pieces still hurts the main body.

Does Aku have multiple selves?

Let me also say this for type 6 immo, when Aku's parts are broken off, he can be reshaped separately from his original body. We have already seen this in the Jack disease episode, even if his body is destroyed, one drop of it is enough to take over someone else.