Aquaticism - S7-E14
Continuity mistake: Near the end, when Roger is talking to Judy, he has a tie on. But in side shots of him, he has no tie on.
The Microwave/The Meddler - S1-E17
Continuity mistake: In "The Meddler", Nicole is feeding Gumball food with a spoon and drops it on the table. The camera cuts to Darwin and then back, but the spoon is now gone.
Continuity mistake: When Chris is trying to activate Hummingbird Power, his skin is suddenly lighter than in the previous shot.
Dan Vs. the Animal Shelter - S1-E5
Continuity mistake: When Dan is pulling the meatloaf out of the oven, Chris knocks. You see the chain is attached from the door to the wall. In the next shot, the chain is undone without Dan having done anything.
Continuity mistake: This is supposed to be the Rangers' first mission and we see Jayden use the Fire-Smasher mode of his spin sword. Jayden didn't learn how to use that feature until the third episode of the series, which takes place after this mission.