For me it's a toss up between The Legend Of Dragoon and Ratchet & Clank both were instant classics as soon as I played them. --- PSN: LT-2392 Playing: UMvC3, Dissidia:012, Dead Island, RE5, Saint's Row 3. Official Hatsune Miku of PSASBR Board
Shadow of the Colossus and the first Okami, I still consider it a Playstaition game --- (TDPS) The Dedicated Portable Society - Stand together for the general promotion of dedicated portables and the quality software they provide us.
However this game doesn't look that good to be honest it looks like it was only made to compete with Super Smash Bros. Heck this game even has some lame characters already for a Song Brawl (Guessing that's "Fat princess".) --- http://ui04.gamefaqs.com/963/gfs_75574_2_16.jpg