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 despite having a whale's blowhole, so his actual species is questionable. 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 version of the game.

He returns in Banjo-Kazooie: Nuts & Bolts as part of Banjoland, but L.O.G. has separated him into multiple sections. His head sticks out of the wall as an exhibit while his teeth appear as a separate display; a portion of his body containing spinning blades serves as a tunnel; the remainder of him is lodged into the ground as a ramp and bridge. One of the challenges involves protecting his eyes from being stolen by attacking Gruntbots.