This is a hack to allow Mario & Wario to be played with a standard controller.
It was created by an unknown author and found as a pre-patched ROM.
It allows the Control Pad to function as the cursor and the Y Button is the left mouse button.
The original hack did not support the right mouse button, so the game could not be paused. KingMike fixed that.
Mario to Wario (Japan)
CRC C6695E34
MD5 B1774F03700DFC311BFD86411DB629C3
Identified by no-intro, verified dump by KingMike