CheatCodes.com has all the official Looney Tunes: Marvin Strikes Back Game Boy cheats to unlock everything. If you know of any that we don't have, please let us know.
All published and official codes as of Sunday May 19, 2013 for Looney Tunes: Marvin Strikes Back are shown below.
At the main screen, hold select, up, down, a, b.
Last updated: April 19, 2002 by Chalk Man
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