He also attends Grunkle Stan's party in "Double Dipper." Pacifica Northwest bribes him with money to applaud for her, causing her to win the Party Crown.
He appears in "Irrational Treasure," celebrating Pioneer Day by gold panning and telling children at the library to eat books.
He ends up changing bodies with Candy Chiu and other characters when he follows Soos into the room with the Electron Carpet at the Mystery Shack.
After everyone changed back to their normal bodies, Mc Gucket threatened to eat Soos.
Mc Gucket appears next in "Headhunters." He was present at the re-opening of the Wax Museum of Mystery, and he asks if the wax statues are alive and if he can survive the wax man uprising, to which Mabel answers yes. They wave at him to see if he uses his right or left hand most frequently, and he responds to them by waving his right hand, which has a young alligator biting down on it.
In "The Hand That Rocks the Mabel," he rows the gondola that Mabel and Gideon Gleeful use on their date. Manliness," Mc Gucket is seen drinking coffee at Greasy's Diner.
The night before testing the machine, Fiddleford expressed his concerns to Ford about the portal's stability, suggesting that Ford publishes his research as a thesis and forget the portal, to which Ford- already manipulated by Bill into mistrusting Fiddleford's motives and intentions- angrily refused.
Unfortunately, continuous encounters with paranormal entities within the town and a heavy over-reliance on his creation deteriorated Fiddleford's mind, draining him of his sanity and increasingly devolving him into a crazed and lunatic old man.After Dipper comes back, unsatisfied with the voice induced by the formula, Mc Gucket gives him another, though Dipper does not drink this one.In "The Deep End," Mc Gucket can be seen hanging out in the Gravity Falls Pool.Though Ford was able to rescue Fiddleford, the encounter left the latter deeply scarred.Determined to return his sanity and eradicate the experience from his mind, he utilized his genius ability to invent a memory erasing gun, permanently relieving him of his nightmares.Fiddleford Hadron "Old Man" Mc Gucket is an old, deranged hillbilly who lived at the Gravity Falls Junkyard and an occasional ally of Dipper and Mabel Pines.