The following are known Action Replay Codes for Gradius Advance 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)
3b5d42b6
99a6efc4
80bd6a93
f8909565

Inf lives
eadf1f8b
20212ec8

Monster score
e565a7b3
ef91ab12

Max weapons
f36cdbfe
2c4e9122