Kirby: Canvas Curse

Bonus characters:Have the Game Boy Advance game Kirby And The Amazing Mirror in the cartridge slot and load a saved game from it. Alternately, complete Kirby: Canvas Curse with the GameBoy Advance game Kirby's Nightmare In Dream Land in the cartridge slot.

Successfully complete the game to unlock Waddle Dee and also unlock King Dee Dee Dee for purchase (20 medals).

Buy King Dee Dee Dee to unlock Metaknight for purchase (25 medals).

Successfully complete the game with Kirby, Waddle Dee, King Dee Dee Dee, and Metaknight to unlock Waddle Doo.

Medal Swap Unlockables:
You need to get the appropriate amount of medals before you can unlock these in medal swap. Some of these cannot be unlocked until you meet certain requirements:

Bead Line - Six Medals
Course 1-8 - Nine Medals each
King Dedede - Twenty Medals
Life Boost - Seven Medals
Life Boost - Twelve Medals
Life Boost - Fourteen Medals
Meta Knight - Twenty-Five Medals
Song One - Three Medals
Song Three - Three Medals
Song Two - Three Medals
Tropic Line - Six Medals
Zebra Line - Six Medals