This hack is my second upload to the vault, but my first real custom stage. It's Giygas' Lair from Earthbound. I think it turned out pretty good. Giygas is animated using a PAT0 animation.
Here are some pictures:
Here is the link to the Vault post:
http://forums.kc-mm.com/Gallery/BrawlView.php?Number=32431&Moderated=All&facebook=true
You should definitely check it out!