Grandpaps is K'nuckles's living Grandfather who appears in the episode I'm a Believer. He told K'nuckles he would show up at his birthday party even if he became a ghost. But due to K'nuckles going to the wrong building he missed the party believing Grandpaps didn't show up thereby causing K'nuckles to not believe in ghosts. He pronounce's K'nuckles's name 'Nuckles' and appears to be more human like than his grandson.

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