Bug: Use Kirby and eat Yoshi so you copy his eating ability. Then eat Yoshi to turn him into an egg. The person playing as Yoshi must quickly mash buttons and the control stick to break out. When Yoshi is free, he will be smaller. This can be done over and over again, making Yoshi smaller and smaller. He can even get as small as a single pixel.
Audio problem: In the stages of Cornaria and Venom, the themes are reversed. The Venom theme plays on Cornaria, and the Cornaria theme plays on Venom. The Venom theme is also played as Fox's theme when it should be the Cornaria theme.
Bug: Mr. Game & Watch has his Oil Panic move where he can catch 3 projectiles and throw oil back as an attack. But if he catches 3 of Ness' PK Flash attacks, a glitch occurs where if Game & Watch moves at all, he will explode violently and be sent flying off the screen for an instant KO.
Other mistake: The Cloaking Device item helps nobody but CPU players. It renders a player almost totally invisible, and negates damage taken when activated. But players themselves can't see their own character when cloaked while CPU players have no trouble seeing them at all. Other than negating damage, the Cloaking Device is a poorly done item that only helps CPU players.
