The following are known Action Replay Codes for Metroid Fusion on Nintendo Game Boy Advance (GBA).

These are Action Replay Version 3 (V3) Codes.

The codes should work with the region specified but may work for other regions as well.

(M)
167201ed
1960132f
c2f0148c
3080f012

Inf Health
300b9786
c5272e9d

Have Missiles / Bombs
ae9c29a6
a3d260ff

Max Missiles
ed05f0d0
de814736

Max Mines
75e86f4b
8a26f96a

Invincible
51d7429f
a8d97c5f

Super Metroid
28b05ffd
4da081ae
5b17fa11
ca8e4a36