CheatCodes.com has all the official The Simpsons: Night of the Living Treehouse of Horror 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 Thursday May 23, 2013 for The Simpsons: Night of the Living Treehouse of Horror are shown below.
Go to Password when your at the house (not the treehouse) and put in "BXPGQNCWBNB"
Use "CJYLTGNLGPX" as a password. On the level, you'll relize that there are more floating bombs and enimies.
JTWKYTQBBKW FWXCKJXGLWN TNSLRYSJGWW BXPGCFPYJWB WSQLSWRBNRF WSQJLTQFYWK NPKYGBKTFWQ XQRFJWRBTWP
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