Here’s all of my ultimate ideas:
Make all of the Toa Mata the same character, but the Kaita would be like Pokémon Trainer, (example: if you choose Wairuha Kaita, you could switch between Lewa, Gali, and Kopaka), and the Toa Nuva would be alt skins. Special would transform them into the Kaita, and then another special would use Toa seal, and switch them back (think Samus from Wii).
Boh-Rok would obviously be the different skins, plus Kal skins. Their special would be the Boh-Rol swarm, and then one of there moves should have a Boh-Rom Va come, give them a new Krana with a special power.
Nuparu’s alt skins should be Hafu, Macku, Kopeke, Kapura, Kotu, and whatever the MNOG ale-Matoran is, so basically the Toa Rejects, aside from Nuparu, and then the special would pull out the Boxor, but it could be destroyed. Other than that, they’d be standard disc-throwing Matoran.
The Rahkshi should obviously have the seven colors as skins. Their special would be sticking their staff into the ground, causing an earthquake.
Takua and Pewku (that’s how you spell it, right?) should have alternate skins with Jaller, Hahli, Kongu, Hewkii, and Matoro, then maybe some other random Matoran like Onepu. Their special could be taking a Kohli stick and smacking super-powered Kohli balls at everyone.
Takanuva’s alternate skins should be different colors of him, like how Av-Matoran can change colors. Takutanuva should be Takanuva’s special, not an extra character
Makuta’s special should be the Mata Nui robot. Other skins: just random colors, I guess...
Vakama’s alternate skins: obviously the Toa Metru. Special: he could pull out the Vahi and do weird things.
Lhikan’s alternate skins could be like Toa Nidhiki, Toa Tuyet, Toa Dume, Toa Iruini, and Toa Norik. Special: ???
Vahki: Other Vahki, I don’t know enough about them for a special.
Nidhiki: other colors, I don’t know what for a special.
Hordika Matau would have the other Hordika, with specials being a special Rohtuka?
Visorak would just be the variants, with the special maybe being like summoning the big one Roodaka rides on
Roodaka would have alternate skins of Sidorak, and her special would be reducing everyone to a Rahaga-like creature, where she can deal damage to anyone without being threatened for a period of time.
Krahka? Is that the creature’s name? Don’t include her.
Nuparu: maybe just make him Kongu as the main picture, and then have all of the toa be alternate skins, with specials being down special Zamor.
Vezok: Each Piraka, of course, and then they need a laser-vision move, and the special could be the Spear of Fusion or something.
Axonn skins I have no ideas for, special could be maybe an axe slam attack...
Brutaka I also have no skin ideas for, except one should be a mutated form... His special could be him using his four arms to deal significant damage...
Vezon and Fenrakk I still have no skin ideas for, and special would absoluty have to be Kardas Dragon.
Hahli Mahri skins are the obvious choice, and the special could be shooting above, causing debris to fall from the sky...
Ehlek skins: still obvious. Special should be flooding the map in water, and then sending the army to attack.
Lesovikk skins: his team? His special could be flooding the map, then using his water speeder to ram or shoot people.
Maxilos: skins could be Hydraxon. He would sick Spinax on people, and his special could be imprisoning a random player, so everyone can attack the player as much as they’d like before the cage breaks.
Toa Ignika skins should be Mata Nui, and then each Phantoka Toa and Mistika Toa. Their special should be using the sky board thing to fly around, like Lesovikk’s except no water.
Chirox skins would be the other five Makuta, plus Icarax, and the special could be the storm?
Krika would just be a Chirox skin.
Gresh skins would be the other eleven Glatorian or retired Glatorian, and the special could be calling in a vehicle maybe.
Tuna skins I have no ideas for, and then the special would maybe be calling in some CPU Skrall.
Mata Nui would be an Ignika skin.
LOSS I have no ideas for, but special could have something to do with the golden skull spider mask.
Ekimu and Makuta should be the same character, plus protectors as skins.
Makuta would be Makuta skin.
To fill some open holes: Toa Masters, Toa Uniters, Skull Warriors, Skull Bashers, Umarak, Shadow Horde, G2 JT1 Makuta, Elemental Creatures, Nocturn, Keetongu, Turagas, Irnakk, Nui Rama, Good Guy (ok maybe not), Av-Matoran, Agori, The dude in 2009 with the Thornratus, Zyglak, Metrutoran, Voyatoran, Mahritoran?
All of these are just ideas, I don’t mean to tell you what to do, just some thoughts. Cool topic, I want this game!