The following are known Action Replay Codes for Tomb Raider: Curse of the Sword 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
91ea92c1

Infinite O2
91ea93c1

Have Unlimited L.Health Paks
9163b3c1

Have Unlimited S.Health Paks
9163b4c1

Have 99 Door Keys
9163b5c1

Have Sub Dock Key
91ffb6c1

Have 99 Dynamite Sticks
9163b7c1

Have 99 Cannon Balls
9163b8c1

Have Old Valve
9101b9c1

Have Ancient Shield
9101bcc1

Have Crowbar
9101bdc1

Have Train Lever
9101bec1

Have Piece Of Safe Code
9101bfc1

Have Rapid Bullets
916396c1

Have Shotgun Rounds
916397c1

Have Gun
910195c1

Have Fire Exit Key
9101b6c1

Have Generator Key
9102b6c1

Have Chemical Plant Key
9104b6c1