- “I thought I was left-handed Morty...”
- —Fat Morty
Fat Morty was a Morty on the Citadel of Ricks who debuted in season 3 episode 7 "The Ricklantis Mixup." He originally thought that he was "left-handed Morty." He is friends with Slick Morty, Glasses Morty, and Lizard Morty whom he is also classmates with at a school for Morty's in the Citadel.
In his debuting episode, Fat Morty embarked on an adventure with his friends to find the wishing portal in the Citadel before graduating at the school of Morty's.