Pit
Zero Suit Samus
Wario
Ike
Pokémon Trainer
Diddy Kong
Meta Knight
Lucas
King Dedede
Pikmin and Olimar
Mario
Link
Kirby
Pikachu
Fox
Bowser
Donkey Kong
Yoshi
Peach
Ice Climbers
Samus
Shiek
Ness
Marth
Luigi
Falco
Captain Falcon
Lucario
R.O.B.
Snake
Sonic
Ganondorf
Jigglypuff
Toon Link
Wolf
Mr...
What Mario enemy or boss frustrates you the most? Personally, I hate phantamantamost bosses are easy after you've beaten them, but this guy just stays hard. >:(