Read the forum topic for information
"Share" a meal
Match your stone transformations (doesn't work with the standard rock)
As player 2, drive player 1 around
Complete a game of Megaton Punch (at least 3 rounds)
Crack Pop Star in half... Together!
Complete a game of Samurai Kirby (at least 3 rounds; game can't end early)
Tie in Samurai Kirby (no time out)
Complete The Arena with both players using only Cutter (no P2 death)
Complete The Arena with both players using only Beam (no P2 death)
Complete The Arena with both players using only Yo-yo (no P2 death)
Complete The Arena with both players using only Ninja (no P2 death)
Complete The Arena with both players using only Wing (no P2 death)
Complete The Arena with both players using only Fighter (no P2 death)
Complete The Arena with both players using only Jet (no P2 death)
Complete The Arena with both players using only Sword (no P2 death)
Complete The Arena with both players using only Fire (no P2 death)
Complete The Arena with both players using only Stone (no P2 death)
Complete The Arena with both players using only Bomb (no P2 death)
Complete The Arena with both players using only Plasma (no P2 death)
Complete The Arena with both players using only Wheel (no P2 death)
Complete The Arena with both players using only Ice (no P2 death)
Complete The Arena with both players using only Mirror (no P2 death)
Complete The Arena with both players using only Suplex (no P2 death)
Complete The Arena with both players using only Hammer (no P2 death)
Complete The Arena with both players using only Parasol (no P2 death)
Complete The Arena as a team
Both players have the Cutter ability
Both players have the Beam ability
Both players have the Yo-yo ability
Both players have the Ninja ability
Both players have the Wing ability
Both players have the Fighter ability
Both players have the Jet ability
Both players have the Sword ability
Both players have the Fire ability
Both players have the Stone ability
Both players have the Plasma ability
Both players have the Wheel ability
Both players have the Ice ability
Both players have the Mirror ability
Both players have the Copy ability
Both players have the Suplex ability
Both players have the Hammer ability
Both players have the Parasol ability
Complete Spring Breeze as a team
Complete Dyna Blade as a team
Complete The Great Cave Offensive as a team
Complete Revenge of Meta Knight as a team
Complete Milky Way Wishes as a team
Both players have the Bomb ability