Kirby & The Amazing Mirror is a 2004 action-platform game developed by HAL Laboratory, Flagship and Dimps and published by Nintendo for the Game Boy Advance. The seventh mainline Kirby entry, the game is notable for its unique Metroidvania playstyle and being the first in the genre to support cooperative multiplayer, and follows Kirby as he goes on a journey through the Mirror Dimension to reassemble a mirror after Dark Meta Knight traps Meta Knight inside it.