The following are known Action Replay Codes for Battalion Wars on Nintendo GameCube (GCN).

These codes are for the European version of the game.

Master Code – Must Be On
G81T-EGQ5-GJAA8
QP5Z-U242-WNMET

Infinite Ammo/No Reloads
BY9E-M5MW-JDEB3
RUE3-U6K4-15U0Z
W6N0-M0WZ-6P1XF

Player Invulnerable
1TVQ-NE6B-5FU5C
U79Y-BY9B-4PU13