Rockman 5 EXE is a game made by Sintax for the Gameboy Color.
Overview
This is actually Castlevania DX, another Sintax game. The only difference is that the sprites are take from Rockman Zero. Aside from that, this game is basically Castlevania DX. Even though the cartridge has a GBA shell, it is actually a Game Boy Color game. It is unknown why Sintax did this.