The following are known Action Replay Codes for Scooby-Doo! Classic Creep Capers 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

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93e080d4
93e040d5
93e0e0d7
93e0c0d7
93e020d6
93e0e0d6
93e0c0d5
93e0e0d4
93e080d5
93e0f0d6
93e010d7
93e000d7