The following are known Action Replay Codes for Teenage Mutant Ninja Turtles 2: Battle Nexus 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)
0acd88bf
7d25772d
7a433064
7de54039

Infinite Health
7776206f
46ba3696
498dad2c
a09cf11d
e1391b9a
8edfe4e7
9902e3a3
3e4ee55e

Infinite Health (Spaceship)
9883c6f6
8d104a09
886e377a
3fe86439