Time for Swift's extensive Pocket Characters (Edit: I don't actually pocket these characters, it's more that i know how to use them, but will not use them in a tourney. Really, i don't have any pockets, i don't why i even used the term incorrectly)
64: All of them
Melee: Mario, Samus, Pikachu, Ganondorf, Marth, Roy, Young Link, Bowser, Mewtwo, Ice Climbers, Captain Falcon Mr. Game & Watch, Peach and Luigi
Brawl: Mario, Peach, Bowser, Donkey Kong, Diddy Kong, R.O.B., Lucario, Pikachu, Pokemon Trainer, Zelda/Sheik (not separate), Link, Toon Link, Kirby, King Dedede, Snake, Sonic, Falco, Yoshi, Mr. Game & Watch, Ice Climbers, Ike, Samus, Zero Suit Samus, Olimar, and Wario,
Project M: Luigi, Peach, Mario, Wario, Yoshi, Lucario, Roy, Mewtwo, Pikachu, Jigglypuff, Ganondorf, Link, Mr. Game & Watch, Ness, Meta Knight, Kirby, King Dedede, Snake, Sonic, Ike, Squirtle, Ivysuar, Charizard, Olimar, Wolf, Donkey Kong, Diddy Kong, Yoshi, Samus, and Zero Suit Samus
Smash 4: Mario, Peach, Bowser, Mr. Game & Watch, Donkey Kong, Ganondorf, Samus, Little Mac, Falco, Pikachu, Jigglypuff, Greninja, Duck Hunt, Olimar, Dr. Mario, Dark Pit, Mega Man, Sonic, Mewtwo, Ryu, Roy