Keswick jumping into the incinerator chute instead of the laundry chute.
Dudley chaining himself onto large and heavy objects.
Dudley using the adjective "brave guy" when he puts on the collar.
In the T.U.F.F. jail cell, Bird Brain says "Who, what, where." But who, where, and why were the actual sayings.
In the T.U.F.F. jail cell, Bird Brain lays an egg, yet he's a male bird, which is similar to how male cows are able to be milked in Back at the Barnyard.
AT&T U-Verse says that Dudley has a fear of lightning, but he actually has a fear of thunder.
Keswick has a fear of girls, but in other episodes, he interacts with girls and isn't afraid of them.
In a scene or two, Kitty's headband changes color.
In the first shot, Dudley already has his medal on, despite getting it a few shots later.
When Keswick yells by being interacted by a girl at the end, his left arm is not seen.
Kitty says here that she is afraid of shedding in public, however, in the episode Hot Dog she shaves in front of Dudley and faces the Chameleon in that look without any problem, considering she was technically naked.
When Bird Brain announces his plan to all the citizens that he's going to destroy Petropolis and have them move into his condos, the wire on his microphone isn't connected.
This is the second time we see Tammy, but her appearance changed.