Killbone is one of the prisoners at the Gravity Falls Maximum Security Prison.
Killbone is a large, muscular, dark-skinned man with black hair under a green bandanna. 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.
- A prisoner who appears to be a shaved Killbone without a bandanna claims that "Gideon makes prison life worth living" shortly before the prisoners escape. The confirmed Killbone only appears 2 episodes later, after the events of Weirdmageddon.
- 14. "TV Shorts 1"
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