Characters that have beaten a top MK more than twice:
Snake - Ally, Fatal, HRNUT, Razer
Diddy Kong - ADHD
Falco - DEHF, Keitaro, SK92
Ice Climbers - Hylian, lain, Meep
Characters that have beaten a top MK twice:
Marth - Mike Haze
Wario - Blue Rogue, Fiction
Lucario - KSizzle, stauffy
Characters that have beaten a top MK once:
Pikachu
Olimar
Mr. Game & Watch
Zero Suit Samus
Donkey Kong
Fox
Ness
Characters that haven't won once against a top MK:
King Dedede
Pit
Toon Link
Kirby
R.O.B.
Peach
Luigi
Wolf
Sheik
Pokémon Trainer
Sonic
Bowser
Lucas
Ike
Yoshi
Mario
Falcon
Samus
Jigglypuff
Zelda
Link
Ganondorf