Matt from Wii Sports

Cryptic: R.O.B.
Greenda: Palutaina
Timmy: Pokemon Trainer
Void: Dark samus

Syc: Snake
Scuttlangle: Mr. Game & Watch
Lamanny: Joker (specifically the Akechi palette)
Veronica: can't play due to not having enough hands
Evan: Ridley
Christie: Daisy (constantly taunts)
Lyn: Mii Gunner (Sans)
Andres: Dedede
Evamaria: ROB and MegaMan

jasper is probably Ridely bcuz its based off of me uwu

Im only going to put a few of them because I have a lot... mostly creepypasta oc's.
Scarblaze: Dark Pit
Jessey: Sheik
Sarah: Dedede without FP.1, so she can say "I wish I was DeDeDead", with FP.1, Hero because of Kamikaze
Naiga: Kirby
Emma: Bayonetta

Frost:Dedede
Luno:Hacks the game
Tre: pokemon trainer (charizard)

what about mark?

Ah....he’s a kirby main.

i figured a kirby character