Powerpuff Girls: Battle Him Cheats - GameBoy Color

Unlimited lives
Select the "Enter Secrets" option at the main menu, then enter "UNDEAD" as a code.

Unlimited super attack
Select the "Enter Secrets" option at the main menu, then enter "PHONECARD" as a code.

Unlimited Black ChemicalX
Select the "Enter Secrets" option at the main menu, then enter "MIDNIGHT" as a code.

Power-up
Select the "Enter Secrets" option at the main menu, then enter "ELBO" as a code.

Art Museum trading card
Select the "Enter Secrets" option at the main menu, then enter "MALPHS" as a code.

Townsville City Hall trading card
Select the "Enter Secrets" option at the main menu, then enter "PRINCESS" as a code.

Talking dog trading card
Select the "Enter Secrets" option at the main menu, then enter "RUFFBOYS" or "BIGBILLY" as a code.

Boogie man trading card
Select the "Enter Secrets" option at the main menu, then enter "HOTLINE" as a code.

Utonium Chateau level
Select the "Enter Secrets" option at the main menu, then enter "GOGETBUTCH" as a code.

Buttercup graphics
Select the "Enter Secrets" option at the main menu, then enter "LUMPKINS" as a code.

Blossom graphics
Select the "Enter Secrets" option at the main menu, then enter "MISSKEANE" as a code.

Mayor graphics
Select the "Enter Secrets" option at the main menu, then enter "MCCRACKEN" as a code.

Butch graphics
Select the "Enter Secrets" option at the main menu, then enter "SNAILSIAM" as a code.

Extra legal pads
Select the "Enter Secrets" option at the main menu, then enter "CLIPP" as a code.

Programmer message and secret photo
Select the "Enter Secrets" option at the main menu, then enter "BILLSGIRLS" as a code.

Townsville Dump level
Play the Utonium Chateau level, defeat Butch, then go to the hearts which let you know you have completed the level. Once that is done, go to the play option and press [Left]. The Townsville Dump level will be now be available. On this stage, you will fight Boomer.