honestly like all of the older episodes. so ones I can think of include the krusty krab pizza, the hash slinging slasher, the one where patrick is like 'i wumbo you wumbo he she wumbo', the marching band, the one where gary disappears, squidward eating krabby patties etc. probably could go on forever haha 8)
yeahh but at the end he disguises himself as gary and tries to steal a krabby patty. guess he's back to himself again ;]