Continuity mistake: After Mike's mother tells him that she heard a prowler, when it cuts to Mike and Carl showing up at her house we see that the window is wide open, but when they move in closer ordering the "sicko" to come out of the hedge, the window is closed as it should be, until Mike's mother opens it when she sees that the "pervert" is actually Kay. (00:00:55)
Where the Wild Kings Are - S1-E5
Visible crew/equipment: When the twins are tied up in Pupaley's cave, just as they get on their knees and beg to be let go, the hand of a crew member holding the end of the rope is visible at the right of the screen. (00:19:25)
Space Monkey - S1-E1
Continuity mistake: Ricky's coffee mug changes position when he says "The telly was the 20th century" to Karl. (00:04:30)
Factual error: PJ is getting his hair cut by an attractive female barber. Attached to the outside of the window is a neon sign reading "BARBER SHOP," but the sign faces the inside of the building so it would be backwards to people outside.
Mario VS Sonic (Nintendo VS Sega) - S5-E13
Continuity mistake: After Mario is victorious and is lying back down in his lawn chair, watching the mushroom cloud, he's back in his swim trunks with Cheep Cheep fish on it. An extra Cheep Cheep appears on his left leg by his crotch that was not there at the start of the episode. (00:15:20 - 00:18:10)
Continuity mistake: If you notice, Robbie's puppet "Rex" is bigger in this episode. (His head is huge.) But for the rest of the show his head is smaller.