I think these would be good contributions:
Wario
Waluigi
Petey pirahna
Goomba
Birdo
Captain Johnny Jones
Stalfos
Tootankoopa
Daisy
Diddy, lanky, dixie, chunky, kiddie
Baby Bowser, Lemmy. roy, wendy, morton jr., larry, iggy, ludwig von
Mallow Nimbus, Geno, Jinx (from Mario RPG)