The following are known Action Replay Codes for Bomberman GB 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

Explosions Modifier
01XX37c1

Infinite Lives
010306c1

Infinite Time
010433c0

Infinite Time (Alternate)
010686c5

Invincibility
015922c8

Place Bombs Modifier
01XX35c1