Similar to the previous hack by Insectduel, "Megaman Showdown IV EX" (Boss Mode) focuses on enhanced difficulty in Mega Man 4 (USA). This version maintains the core structure of the original NES game, but enhances the challenge for players. The changes are likely to focus on the overall challenge, increasing enemy difficulty and boss health and attack patterns. The original Mega Man 4 is known for its balanced design;  this hack aims to provide a more intense challenge while preserving the core gameplay of the original.

Mega Man 4 (USA) [Hack by Insectduel v1.0] (~Megaman Showdown IV EX) (Boss Mode)

Mega Man 4 (USA) (Rev A) [Hack by Mickevincent v1.0] (~Mega Man - Maverick Revenge)