Clinker

Clinkers are large, brown grime-like enemies in Banjo-Tooie who appear in the sewers of Clinker's Cavern in Grunty Industries. Banjo and Kazooie are tasked with clearing out twenty Clinkers out within 200 seconds before they intoxicate the air. Even after the timer runs out, the Clinkers can still be defeated, but the toxic air causes Banjo and Kazooie to lose health.

If Banjo inputs the cheat "HONEYKING" in the Code Room of Mayahem Temple, the Clinkers cannot harm him, even after the air becomes green and intoxicated.

Trivia

 * Clinkers are named after "clinker", a British slang term referring to a deposit of rust and grime that grows on metallic surfaces. However, the farting sounds made by Clinkers and their appearance in the sewers suggests they are composed of feces.