Dr. Shrunk

Dr. Jeffery Shrunk is an Axolotl and a special character in the Animal Crossing series who has appeared in all games since Wild World, but was excluded from New Horizons. He gave the player the ability to use emotions in all of the games. His name could refer to the word "shrink", a slang term for a psychologist. He did stupid things and destroy thing.

K.K. Slider
K.K. Slider is Dr. Shrunk's adoptive father he always called K.K. "Daddy" K.K. tried to stop Dr. Shrunk to do stupid things and destroyed things.

Tom Nook
Tom Nook seem to help Dr. Shrunk so he always messed up his store dozens of times. Dr, Shrunk wants to work with Tom Nook so he sold the signs to Blathers.

Isabelle
Isabelle can't stand for Dr. Shrunk so he wants to be the assistant sometimes he destroys all of isabelle's stuff for some reason such as ruined all of Isabelle's paperwork.