*Please add pictures*
Reverse Fiddleford McGucket is the reversed version of Fiddleford McGucket. He is a scholar in reverse form and still has his sanity. McGucket could be the author of the journals since a true author has not yet been confirmed, but it is the most likely suspect.
Reverse McGucket's appearance differs greatly from the original Old Man McGucket. He is either drawn with gray hair, a short white beard, and a black suit, or pale brown hair and a turtleneck sweater. (similar to Stanford Pines)
In other Head cannons it is said that Fiddleford is a suspicious man with a similar age range to Ford and Stanley, in Fanart along with Cosplay and Fanfictions Fiddleford has a Metal robotic arm replacing either his left or right reaching up to his shoulder, without a white beard, he still holds onto his dirty blond mullet, and his constant clothes of vests and neon or black dress shirts.
McGucket is still sane in the Reverse Falls, considering he hasn't used the memory gun on himself multiple times. He is often shown more mature than Stanford, but it is unknown if they are still friends, or have any sort of relationship.
He is considered a mechanical genius, though in a proper and organized manner he creates his monsters of machines in secret, or for terrorizing the town.