Clanker

Clanker is a character found at Clanker's Cavern in Banjo-Kazooie. He is an extremely large aquatic creature, sort of resembling a giant cyborg shark. Grunty uses him as her Garbage disposal but therefore has him in a worsening condition. He is attached to a chain connected in a deep area at the bottom of the room. Banjo has to swim through a key-loop 3 times to release him. Banjo may enter him from his teeth, blowhole and gills. In the beta video, it looked like Clanker was going to be organic (probably changed to not inspire animal cruelty).

Many beta shots show Clanker opening his mouth fully wide open after knocking out his teeth but it was never seen in the final game.

Clanker appears in the third game, Banjo-Kazooie: Nuts & Bolts(In pieces). He is one of the exhibits in Banjoland. If you can protect his eyes from being stolen, you receive a jiggy. You must also dodge his innards during a race.