Too many characters "go even" with MK now.
~MK's MUs imo~
Even/Advantage: Nobody
-1.0: Olimar, Diddy Kong, Ice Climbers, Snake, Pikachu, Fox
-1.5: Falco, Marth
-2.0: Wario, Mr. Game & Watch, Wolf, Ness
-2.5: Zero Suit Samus, Sheik, Yoshi, Lucas
-3.0: Lucario (?), Toon Link, Peach, Pit, ROB, Kirby, Sonic, Ike (?), Pokemon Trainer, Luigi, Mario, Samus, Jigglypuff
-3.5: King Dedede, Donkey Kong, Bowser, Captain Falcon, Link
-4.0: Zelda, Ganondorf
Note that I don't consider -3 to be "close to unwinnable" like most people do.