Bonebot

Bonebot is exactly what the name promises: a robot built to look like a skeleton, drifting through the background of Futurama's world as one more oddball resident of a future New New York. He turns up, says his piece in a flat mechanical deadpan, and moves on without much fuss.

The joke is the whole character, and Phil LaMarr sells it by playing Bonebot completely straight — no wink, no mugging, just a calm robotic voice describing his own skeletal design as though it were the most unremarkable fact in the world. That commitment to a silly premise is what makes the small role land.