Blubi is an important Nimbi from The Flip Flop Show.
While trying to find the three orbs in The Overthere, Puck encountered a frozen Nimbi. Puck melted the ice away with his flame breath, and freed the Nimbi - however, he found himself to have amnesia. Watchitt continued to speak with him until he finally realized that he was indeed Blubi. Luvbi demanded the Blue Orb, which he soon relinquished and then flew off.
Official art of Blubi.