This is a hacked version of the US release of Bubble Bobble for the NES. Developed by Dragon Eye Studios, the "Bubble Bobble Madness" hack likely introduces modified gameplay elements, altered levels, or new features that differ from the original game's design.  While based on the original Taito game, this version offers a unique experience for players familiar with the classic title.  The changes made by the hackers introduce new challenges and potentially different strategies for completing the game.

Bubble Bobble (USA) [Hack by Dragon Eye Studios v1.0] (~Bubble Bobble Madness)

Bubble Bobble (Japan) (3DS Virtual Console)