The following are known Action Replay Codes for Space Invasion 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 Lives
91067dc7

Max Score
910975c7
910976c7
910977c7
910978c7
910979c7

Infinite Continues
916391c6