The following are known Action Replay Codes for NHL Blades of Steel 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

Away Team Scores 0
010050ca

Away Team Scores 50
013250ca

Home Team Scores 0
010052ca

Home Team Scores 50
013252ca