So, for most "
Special Species", of which I am primarily just focusing on the Main Game ones and not the crossover event ones, I'll try to just compose a list and note all the noteworthy bits here. Although I should just throw out there that for the most part I don't know if it's at all clear if a Special Species is explicitly, canonically stronger than the main species, but in most cases it seems to be the case given that most of them have a wider range of abilities overall and that they have much bigger attacks.
Purgatory Agnaktor: Has access to Blast Blight, is encountered in the same area as regular Agnaktor (that being Volcano from 3rd Gen), at around 2:54 in
this video PA can generate a massive explosion while remaining at the epicenter of it. Thankfully this video has someone who just runs away from the explosion so we can see the full scale of it. We could calc this explosion, maaaaybe have it scale for Special Species in general
Whitewater Plesioth: Has access to Bubbleblight like Mizutsune and can create/control large bubbles that bounce, but other than that doesn't appear to be much else based on hunt videos I found on Youtube
LandConquest Lagiacrus: Manipulates water and Earth to create geysers on land, it also does split the ground and displace a LOT of rock/dirt in its attacks, so it could be worth
calcing
ShiningRock Uragaan: Uses ice and poison to create poison ice crystals that seem to blow up after a delay, and inflicts Noxious Poison. Can freeze the area around it for a good distance, as seen at
around 30 seconds into the video. Might be interesting to calc, but I doubt it'll yield any meaningful results. As I put more info for these guys I am really thinking the only Special Species that is gonna be huge aside from Thunder Emperor Kirin is Purgatory Agnaktor lmao
Thunderbubble Mizutsune: Controls lightning and still uses bubbles, Which apparently can be formed inside of the Mizutsune's body and act as magnets to pull enemies/hunters closer to them which is kinda cool honestly. Otherwise nothing special
Explosive Peak Duramboros: This has potential but the literal ONLY video I can find on it is a guy playing Dual Blades so they're just right up on this thing and we don't get a look at the giant explosions this version creates. Still welcome to try and
decipher this tho
Scorching Heat Rathian: Apparently has the same exact moveset as Pink Rathian so nothing much to report I guess
Thunder Emperor Kirin: Nothing much on the attack animations but hot
DAMN IS THAT STORM SHMOVING! IDK if Tower 3 is like this for other monsters in Explore (assuming that any other monsters in the game can even be fought there) but we know for a fact that other monsters fought there in previous games were not accompanied by that kind of weather so we COULD attribute that to Kirin and try to figure out a kind of KE for the movement of those clouds of the generation of a super severe thunderstorm like that, assuming it'd even be any different from the one Kirin already scales to. Additionally, not clear if this is applicable to other Special Species as Kirin is the only ED to have a Special Species and could just be way stronger than the others.
Fiercewater Nargacuga: Can cause bleed and manipulates water, and it can create a large burst of water with its tail or wings that eject said water, but IDK if this would be worth much. Still, here is a video. Basically has all the abilities of basic Narga but can
augment itself with water.
Iceblast Brachydios: This has potential. Opens its fight by freezing the ground and creating four large ice sculptures that are just a tad taller than itself,
it seems. They can even be destroyed to create tall, this explosions. Also at around 2:54 Iceblast Brachy begins to start a large scale explosion, although this seems to happen more as multiple blasts rather than one. Still, could be noteworthy I guess.
Virulent Gigginox: Has massively buffed AoE attacks that use water and poison but nothing else really.
The fight
Black Star Beast Volvidon: I can't find any videos atm, there might be some out there but I'm just not immediately finding it so that'll have to wait
Immortal Zinogre: Honestly it looks almost exactly like a regular Zinogre in the fights so IDK if there is anything worth our while in this one either
Flame Rathalos: Acts kinda similarly Silver Rathalos (according tot he wiki), really is just a mess of fire and explosions.
Fight video
Frozen Barioth: Uses poison, and this one is interesting because there is a moment in the ONE fight video of this thing I can find that has me confused. At a certain point in the video I cannot tell if it creates a super tall ice structure or if it's just a snowy tornado that Barioth usually make. Either way, could be interesting if it's the former???
Here it is, I even linked to the time stamp, it's 2:12 if the link doesn't work right.
tl;dr: Most important monsters here are Duram (but the one vid we have of it doesn't show a lot), Thunder Emperor Kirin, Iceblast Brachydios and by far Purgatory Agnaktor. Again, I assume most of the Special Species scale to each other with the exception of the lone Elder Dragon Special Species, which is Thunder Emperor Kirin. This is the best I can do in my sleep deprived state so my apologies if I made mistakes, feel free to correct me. Sorry for the wall of text and good luck handling it lmao