What character from an already well-represented series do you want to see in Smash 6?
I want Electivire. There are definitely people, probably a lot, who think Pokémon already has enough reps, but I think we need at least one more big heavy Pokémon, of which Incineroar and Charizard are currently the only ones, and humanoid Pokémon, which again includes only Incineroar and an argument could be made for Lucario. I think he's got some interesting potential for moves, and the mod that adds him to Ultimate says it has random variations on f-smash potentially being Ice, Fire or Thunder Punch, which maybe could be switched to a directional input like Peach/Daisy's f-smash. I thought of Magnet Rise for up-B, possibly a Snake-style recovery tool. Giga Impact is a move that Electivire learns at later levels a lot in Pokémon games, perhaps that could be his side special, a bit like Little Mac's neutral special with long lag time, armor and high power. I also found it a bit odd that neither Pikachu nor Pichu have Thunderbolt, so possibly Thunderbolt for a neutral special projectile, or perhaps Electro Ball. He'd probably be in a similar weight class to DK or Ganondorf and have powerful attacks like them but also be on the slower side in terms of movement speed/maneuverability.