Its Metada, my Metaroller(mabey) from my Monster Rancher Advance game.
Aww, I just love Psyrollers... I hate their new naems in MR4 though. Now they are called Rhinorollers. More Tecmo changeing a perfectly fine name to something a bit more lame. They did this to the Nya too. Now they are called Mew. Curse.