The following are known Action Replay Codes for The Powerpuff Girls: Mojo Jojo A-Go-Go on Nintendo Game Boy Advance (GBA).
These codes were also known as GameShark Codes and in most cases will work on both devices.

These codes are for the U.S. version of the game.

Master Code – Must Be On
b86b2e14
ec60c691
3e081066
8faa6241

Max Score
d95cdfa1
cb889f7d

Max Jewels
5d68ccaf
231b33a1

Girl 1 Infinite Health
d591a501
22571bde

Girl 2 Infinite Health
6c2b0c81
cb6cb2da

Girl 3 Infinite Health
93a30f8b
67d65800

Girl 1 Super Weapons
0efef45a
f0ec2119

Girl 2 Super Weapons
41cb7c35
31bc71fb

Girl 3 Super Weapons
38d8c774
b27c9940

Have Super Attack
d14b83b8
61ccb259

Unlock All Levels
3a87dd1f
02bf29a3