Killbone is one of the prisoners at the Gravity Falls Maximum Security Prison.
Killbone is a large, muscular, dark-skinned man with black hair. He has a square head, a unibrow, small eyes with bags under them, a round nose, prominent lips, and a thin beard and mustache. He wears an orange prison uniform with ripped sleeves. The number "1100" is written on his prison uniform.
- 14. "TV Shorts 1"
- 220. "Weirdmageddon 3: Take Back The Falls" (no lines)