The following are known Action Replay Codes for Microsoft: The Best of Entertainment Pack 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

Ski Free – Stop Timer
910027c9

Ski – Free – Always Top Speed
91050dc9

Tut’s Tomb – Infinite Time
9100acc8

Tri Peaks – Always have 25 cards
91fffcc8

Tri Peaks – Crazy Cash
91ffaac8
91ffc9cf