The following are known Action Replay Codes for Power Rangers: Lightspeed Rescue 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

Have Grappling Hook
0101dec7

Have Medicine
0102ddc7

Have Cable Cutters
0103dcc7

Have Fire Extingusher
0104dbc7

Have Door Breaker
0105dac7

Have All People Rescued
0114d9c7

Infinite Lives
0109e9c7

Infinite Health
0108e2c7

Infinite Lightning Bolts
010ae3c7