Rainbow Costume Cheat Code for Batman: The Brave and the Bold (DS) — Does Not Exist

No cheat code unlocks a "Rainbow Costume" in Batman: The Brave and the Bold (DS, 2010). The game has no cheat code system (no password entry, no konami-style codes).

Unlockable Costumes (Legitimate)

• Complete Story Mode chapters → unlock alternate skins (e.g., Batman Beyond, Zur-En-Arrh, 1966 TV, Dark Knight).
• Collect Bat-Medals in levels → purchase skins in Batcave menu.
• Multiplayer co-op milestones.

Action Replay / NitroHax (Flashcart)

Cheat databases (usrcheat.dat) may contain "Unlock All Costumes" codes. Use at own risk — can corrupt save.

If You Saw a "Rainbow" Costume

It's likely a custom texture hack (ROM hack) or a misremembered skin (e.g., Zur-En-Arrh is colorful red/purple/yellow). No official rainbow suit exists.