The following are known Action Replay Codes for Turrican 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 Bullets
0103fec4

Infinite Buzzsaws
0103c3c5

Infinite Grenades
010301c5

Infinite Lives
0103ddc5

Infinite Powerline
010304c5