The following are known Action Replay Codes for Men in Black II: Alien Escape on Nintendo GameCube (GCN).

These codes are for the European version of the game.

Master Code – Must Be On
U5UA-Z5D7-H84P6
9YRD-BA28-KFY0P

Infinite Health
GMA0-U3JH-DU92N
UYX0-N82U-KDKN1

Infinite Lives
4543-Y37R-C4WT6
Q1N9-G4A6-TJ7F9

Infinite Xeno Bombs
9C9Y-B91V-T0CRE
FM2F-FEC2-XE34U

Massive Score
8M20-Q1J6-UFPG0
71GN-CUJV-U4B2U