British dog man

The  is a minor character in Gravity Falls who appeared at the command of Bill Cipher in "Dreamscaperers" when he tortured Mabel and Soos with their nightmares.

History
When Bill Cipher establishes an arena upon which to fight Mabel, Soos, and Mabel's dream boys, Soos unwittingly speaks about his nightmares about a "British dog man." This slip of the tongue leads Bill to create the dog man, who quickly decides to whack Soos repeatedly in the gut with his walking stick. However, when Dipper comes along to fight Bill, he destroys the dog man with laser beams from his eyes.

Appearance
The dog man is an English Bulldog who wears a brown bowler hat, a brown suit, a light green tie, and a monocle on his right eye. He walks upright, like a human, and carries a walking stick, which he uses to smack Soos in the stomach.