Continuity mistake: Penny sets up a ladder next to Gumball's window. The ladder disappears in the next shot, and reappears in a later shot.
Continuity mistake: After Gumball stops crying, there are still tears on his face. In two shots, the stream of tears disappears.
Continuity mistake: Gumball pokes his tongue through a newspaper that Darwin was holding. In a few shots, the newspaper disappears.
Continuity mistake: The Wattersons are listening to Gumball's conversation through the door, and Nicole is using a drinking glass. In a few shots, Nicole does not have the glass, nor is it on the floor.
Continuity mistake: Gumball is sitting at the dinner table, and a pile of food is next to his plate. Two shots later, the food disappears.
Continuity mistake: Gumball is on stage at a play. He is saying his line and facing away from the audience. In the next shot, he continues his line, now facing the audience.
Continuity mistake: Penny is looking next to the corner of a wall next to some lockers. In the next shot, she is now next to her locker, which is not that close to the corner she was just standing next to.
Continuity mistake: The Kids are playing cards on the floor, with some cards in their hands and in a pile on the floor. Right before The Kids stop playing, the cards on the floor disappear.
Continuity mistake: Nicole punches the number pad of a telephone receiver, damaging it. Later, Anais picks up the same phone receiver, but the number pad is fixed. No one but Richard touched the phone in the meantime, and he did not fix the phone, either.
Continuity mistake: A man drops a DVD case in the video store. Two shots later reveal an empty store with no DVD case on the ground.
Continuity mistake: Richard's flashback shows him throw money onto the counter. In the next shot, The Money disappears.
The Downer - S3-E37
Continuity mistake: Gumball is being overtaken by the darkness, and there is a coffee table in front of him. When he escapes the darkness in a few shots, the coffee table is missing.
Continuity mistake: Toll booth men are throwing fines and tickets at Richard's car. These tickets and fines disappear in a few shots without being blown away by the wind.
Continuity mistake: When Richard is driving down a highway, he makes it into a lane with a truck in it. In two shots, the truck has vanished.
Continuity mistake: Gumball is talking to his dad in front of the couch. In two shots, Gumball is now at the door.
