If the Amazing World of Gumball was Teen Titans

Gumball - Cyborg

Reason - Because of how Cyborg is just like Gumball

Darwin - Starfire

Reason: Because of both being sweet and caring.

Nicole - Robin

Reason: Because of how energetic they can be.

Anais - Raven

Reason: Because of both being smart

Richard - Beast Boy

Reason: As Richard labels himself as a human shield, he is also just like him when eating and sleeping.