The following are known Action Replay Codes for Heroes of Might and Magic II 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 Gold
016327cc
016328cc

Max Wood
016321cc

Max Mercury
016322cc

Max Ore
016323cc

Max Sulfur
016324cc

Max Crystals
016325cc

Max Gems
016326cc

Day Modifier
01xxafca
Replace xx with 01 thru 0f

Week Modifier
01xxb0ca
Replace xx with 01 thru 0f

Month Modifier
01xxb1ca
Replace xx with 01 thru 0c

Infinite Men In Battle
01639bcb
01638dcb