The following are known Action Replay Codes for Ready 2 Rumble Boxing on Nintendo Game Boy / Color (GB / GBC). These codes were also known as GameShark Codes and in most cases will work on both devices.

Device Compatibility: Action Replay & GameShark

Infinite Health P1
013240c4

Infinite Health P2
012440c5

Infinite Rumble P1
01064bc4

No Rumble P1
01064bc5

Infinite Rumble P2
01064bc5

No Rumble P2
01064bc5