The following are known Action Replay Codes for ECW Hardcore Revolution 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 Energy Bar P1
01bf86c4

No Energy Bar P2
010086c5

Infinite Spirit Bar P1
01bf85c4

No Spirit Bar P2
010085c5