Wario Land 4 (known in Japanese as Wario Land Advance: Yōki no O Takara) is an action-adventure game released by Nintendo for the Game Boy Advance in 2001. Players control the greedy yet brave Wario as he delves into a legendary pyramid in search of treasure. The game is renowned for its varied level design and a rich transformation system: Wario mutates into forms like Flame Wario and Zombie Wario after specific enemy attacks, each granting unique abilities for combat, puzzle-solving and traversal. Each stage hides gem pieces and CDs, encouraging thorough exploration and replay. A true GBA classic.