I'm bored so heres a quick new list. no particular order in the sections:
Strong disadvantage: (<-1)
Rosalina, Sheik, Sonic
Disadvantage: (-1 to 0)
Luigi, MegaMan, Yoshi, Pit, Dark Pit, Metaknight,
Neutral: (0)
Mario, Link, Falco, Greninja, Duck Hunt, R.O.B., Villager, Olimar, Dr. Mario, Roy
Advantage: (0 to +1)
Peach, Bowser Jr., Bowser, Wario, Mr. Game & Watch, Donkey Kong, Diddy Kong, Toon Link, Zero Suit Samus, Marth, Ike, Kirby, Fox, Pikachu, Lucario, Jigglypuff, Captain Falcon, Lucina, Shulk, PacMan, Lucas, Mewtwo
Strong advantage: (> +1)
Zelda, Ganondorf, Samus, Robin, Palutena, DeDeDe, Little Mac, Charizard, Wii Fit Trainer, Ryu