Roysten the fish
He appears again in Banjo-Tooie trapped under a boulder. After freeing him and carrying him to the moat, he will teach Banjo a faster swimming ability, and give him more air bubbles.
He appears again in Banjo-Kazooie: Nuts & Bolts as one of the special Stop n' Swop crates. He is an accessory that can be mounted onto your car, and poor Roysten will swim around in his bowl. As a fact, he is the only vehicle part to be guaranteed to fall off during any challenge. Roysten also appears on the main menu.