Audio problem: In "The Robot", Gumball whimpers while his mouth is open. He whimpers again, and this whimper sounds like the first one, except his mouth is closed.
The Amazing World of Gumball (2011)
1 audio problem in season 1 - chronological order
Starring: Dan Russell, Kwesi Boakye, Logan Grove, Teresa Gallagher
The Authority/The Virus - S2-E10
Revealing mistake: In "The Authority," when the Wattersons return to normal and start screaming "The brake!", Darwin's animation repeats itself in the same frame. Thanks to the slow motion the scene is going in, this error is easy to spot.
Nicole Watterson: Well maybe it all comes back to the stupid name you gave me!
Gumball Watterson: Um, what's wrong with Nicole?
Nicole Watterson: Nicole is my middle name, my first name is DOCTOR!