Alright, my summary will be mostly focused on debunking and countering the summary of OP, as it seems these are the backbones of his current points.
Firstly, I will skip the first paragraph since it's basically just setting up the rest of the post anyway, and focus on the claim that "Time Travel" wasn't used by the Time Eater.
It's stated by Tails that
Time Eater traveling through time causes the stages to appear in White Space.
Sonic states in an officially SoJ sponsored interview that every stage in Generations was caused by the attacks of the Time Eater:
This means that, yes, the Time Eater did attack every zone in Generations. (And before someone says it,
Sonic remembers 06, so he would know if Crisis City would've been there normally or not). We know from Tails that the Time Eater by
travelling through time, so for Crisis City to have been attacked, he would have had to
time-travel to it.
But if that wasn't enough, Sonic Generations is referred to as a
time-travelling story. Shadow is also stated
to be travelling across timelines and dimensions. Time Eater's
movement through time is what erases time and space. This shows that time-travel was used to travel towards different timelines, including the erased 06 timeline.
Now, for the second point, which is the "echo" point. This one is far easier to explain.
Gerald does say that echoes of past foes can show up because of everything that happened:
Now, let's be fair and ignore that Gerald just thinks this is a theory.
After all, I used this Tails statement as proof that the Time Eater targeted Crisis City, after all:
However, the keyword here is that Gerald says that the
damage caused to the timestream is what
triggers the past alterations. Meaning that if time has not been damaged, no echoes are appearing.
This is something OP has conceded to, however:
With them already using a counter-argument of Time Eater having already caused damage to the timestream, letting the apparitions of echoes appear. However, even ignoring that currently on the wikia, this scene is not accepted as Time Eater destroying part of space, and instead, him already destroying all of time:
(Classic Sonic's current page).
That scene is indeed when Time Eater destroyed all of space and time. Thanks to Shadow Generations, we can see T
ime Eater simultaneously appear for Sonic and Shadow. (Despite Sonic being on Earth, and Shadow being in space in the ARK). This is also shown by the fact that
Classic Sonic and Modern Sonic appear in White Space around the same time. So, in conclusion, Time Eater didn't mess with the timestream before summoning Crisis City; both the Classic Sonic and Modern Sonic scenes happen at the same "time" when Time Eater
destroys all of time and space.
Now, the third point is what I call an "argument of incredulity". Basically, treating it as if it's too impossible for Eggman to grab the Crisis City from a hypertimeline for various reasons:
Now, ignoring the fact that these aren't real arguments. Ignoring the fact that I can pull an uno-reverse and say that Eggman luckily pulling the equivalent of an SSR gachapull to summon Crisis City is even more unlikely, since there are infinite moments in time and infinite timelines, and we know that Eggman
purposely summoned Crisis City to
lure Sonic in.
And as we know, Sonic himself said all the places he went are nostalgic, including Crisis City. I could also discuss how ignoring the flashback is a genuine media illiterate move, as it's a clear storytelling device to pan over and show "the past defeats" that Eggman mentions in his dialogue, but there's no need.
The main argument for the argument of incredulity is that "Eggman doesn't remember it."
Which... isn't really confirmed nor true at all. We know for a fact that Sonic does remember it, since, as said previously, Sonic
considers all of Time Eater's zones familiar and nostalgic,
and has shown to remember 06 before, as well, but even Blaze, the one Eggman trapped in Crisis City,
remembers 06 in Generations:
Meaning, there's no actual proof that Eggman doesn't remember 06, meaning that it being used in the flashback as an example of Eggman undoing a "past defeat" is valid, since
Eggman's entire plan in 06 was controlling the "Flames of Disaster", Iblis.
So truly, what is more likely? Eggman pulling a one in a infinity gamble, and then trapping Blaze in a place he supposedly doesn't remember to lure Sonic to a place that he doesn't know, or Eggman purposely trying to undo his past defeat of not controlling Iblis, fitting with his motivations in the entire game?
I will let you all decide.
Now to the fourth point, and that the idea that "echoes" existing debunks the idea of hypertimeline in general. Now, let's once more ignore that Gerald is just theorizing with no real proof, and treat everything he says as 100% facts. The point that OP brings is that Mephiles would still exist in its entirety, and Gerald talking about how Shadow changing the past would "erase" the future proves hypertimeline impossible:
But Gerald is actually completely wrong here, and this part here:
Is actually completely and utterly confirmed correct thanks to a character named ESP Silver. ESP Silver is an alternative version of Silver introduced in Sonic Runners. But why is he relevant?
Because his description implies that he's from the 06 timeline:
This is a reference to the ending of Silver's story in 06,
where Blaze seals herself in another dimension. ESP Silver returns in Sonic Speed Simulator as well, where he makes overt references to his defunct timeline:
So thanks to ESP Silver's existence, and being directly stated to be a different Silver and coming from Crisis City, that means that Eggman can go into the hyperpast and pull Crisis City, and Gerald's theory is proven incorrect. If that wasn't enough, the official Sonic Encyclopedia states on page 237 that
Crisis City defied being erased. Meaning that it quite literally did not disappear, and it still existed in some manner, such as a "hyperpast".
For this part:
I will leave out this interview by Shun Nakamura, director of Shadow Generations, where he directly states there's
there's several time planes and that Time Eater was directly affecting them, but also this comment by Ottavio, who has given me permission to post his argument:
And about Eggman's statement of "the dimension of time", I leave this comment by Neontxme that he also gave me permission to post:
Now, for a summary of why it's 6D:
Evidence for the hypertimeline:
1. Time Eater was able to pull a version of the '06 timeline that has Iblis directly at its center, a version of Iblis that would specifically have to be from the erased 06 timeline due to Mephiles being his OG 06 self. This is the Iblis that would have been sealed away in Blaze, and Blaze's dialogue specifically notes it's the Crisis City from 06. We also know it was the Time Eater's doing because it has direct statements of being the cause.
2. The encyclospeedia notes that time was “reset” with Sonic and Elise going back in time, despite all of time at that point being destroyed/erased by Solaris, meaning that they had to set a new version of time prior to the destruction of all time as the basis, and since Solaris exists along time itself, it would mean he exists along the highest echelon of time, the end of time, as he was already capable of consuming timelines with ease going off the Japanese dialogue of his body containing “multiple dimensions” and the quotes that he was or had destroyed all of space time. So, the characters likely jumped to an older version of the timeline before its destruction.
3. Chaos Control
can halt time in White Space despite it
repeatedly being stated that all of space-time was erased, necessitating the use of Hypertime. Shadow
intended to freeze the moment in time where Maria and Gerald were being restored to the timeline in order to prevent it.
Hypertime would obviously have an infinite amount of 4-D snapshots of the timeline, which lines up with two separate sources referring to the stages as "timelines/dimensions", which lines up with how Gerald and these sources point out that each point in time is its own full-fledged universal structure. Meaning that there would be an infinite amount of snapshots for one timeline due to time running infinitely as the default. Characters have used this to pull older versions of existing timelines back into the fray, and thus, the series meets the standard of hypertime.
For a summary of the cosmology:
There's a Mainline Multiverse with a passively growing-changing set with
multiple alternative universes throughout the series,
with the alternative realities created with every possibility of what could have happened. And
timelines are
(possibly) infinite.
Which is possible solely because of
Power of the Stars,
it also consists of a temporal axis being our very first plane of time.
Then Cyber Space(s) serving as a mega server to all information regarding them as a way to pass on their legacy to the future generation, on top of it being a macrocosm of
dreams it is also said be a
dream in of itself.
After this there's Maginaryworld, the place where
all dreams from all
other dimensions are assembled
and become real,
becoming universes/dream worlds. Cyber Space would also be
assembled in Maginaryworld due to the Ancient's dream of preserving their legacy with it and the
Egg Field due to Dr. Eggman's dream to rewrite the world with it.
Due to the multiverse creating alternate realities based on possibilities, there would also exist innumerable, possibly infinite amounts of Cyber Spaces and Egg Fields out there. This makes Maginaryworld scale to both realms on a larger scale: Possibly Infinite 5-D (infinite 4-Dimensional Space with a time component.)
There's a 4th Dimensional Space, the higher plane of Maginaryworld,
dreamed into existence by the Goddess of Dreams herself; Illumina. It encompasses all other Dream worlds,
seeing them as nothing but flat images on a screen. It is
also described as an infinite fourth-dimensional space and
has a time component within it.
All of the aforementioned structures fall under the overarching influence of White Space. A realm that all realities
become once they have been
erased by the Time Eater (combining this with the SoJ scan of Sonic claiming the Time Eater is at fault for each level's appearance, this would debunk Crisis City being there simply because it's erased) and Time Eater's erasure extending
to all of it as we see all points of time + Cyber Space and Spectial Stages. And since it can contain all of the normal multiverse erased inside of it, including Maginaryworld, it is 1 layer above it range-wise.
For Time Eater's Layer being "further away" from the rest of the cosmology than White Space itself. It is 2 layers above it in terms of range wise, needing the Chaos Emeralds to access the realm.
And finally, Infinite Tunnel Dimension, separate from the
previous one and explicitly infinite,
where objects from other dimensions may drift here. It is implied to be a
time dimension. Filling every necessity of another
independent temporal axis, approved by
Tiering System's FAQ.(
Blog)