A robot boy and Gumball's classmate. He is incredibly intelligent. He has tried to understand human emotions. In the past, he almost stole Gumball's life by modulating his voice, but they are still friends.

Gumball's classmate, a yellow ice cream cone. She is an obsessive otaku who is fixated on Gumball and Darwin, and she is quite out of her mind.

Gumball's classmate. As a Tyrannosaurus Rex, she is big, strong, and has a deep voice, but she is female. She is a bully who frequently picks on Gumball. (True to being a T-Rex, she has very short arms.)

Gumball's classmate, a piece of toast. He is often humiliated and frequently dies in gruesome ways.

Gumball's classmate and Penny's cousin. Although he is male, he is a flower who hangs out with the girls. Being a flower, he loves water, and his head can grow back if cut off.

Gumball's classmate and a shape-shifting fairy. She is currently dating Gumball.

A hot dog wearing sunglasses. He has an incredibly awkward relationship with Gumball. Whenever they cross paths, bizarre and cringeworthy situations occur.

Gumball's classmate. He is usually friendly but has a hair-trigger temper. When angry, he shoots 8-bit lightning bolts.

Gumball's classmate, a paper bear with extreme germaphobia.

A goldfish with arms and legs. He is Gumball's brother and best friend. He is very innocent and naive.