Earthbound, Giygas. :3
Do I get extra credit for identifying Heavily Armed Pokey? XD
Mostly it was the humour. It was a pretty solid RPG though, pretty off-beat with a lot of reasonably unique aspects. The plot was pretty decent, the script was entertaining, the characters were likable, the visuals were pretty well done for their time, and it wasn't so easy a drunken monkey could beat it blindfolded.
It would've a been pretty forgettable generic RPG if it wasn't for the off-beat humour laced throughout the game though.