Wario Land 4: Parallel World is a fan-made modification or ROM hack of Wario Land 4 for Game Boy Advance. This version likely changes aspects of the game's story, levels, or gameplay, creating an alternate experience within the Wario Land 4 universe. This demonstrates the passionate community behind game modding and creating variations of existing games.  The specifics of the changes vary based on the specific ROM hack's features.

Wario Land 4: Parallel World

Wario Land 4 - Endless Laps