Other mistake: At times when everything was covered in ashes, Jeeps being driven over ashes had clean tires (black tread). One Jeep that was airborne for a couple seconds (coming out of a fire) had clean tires, but the tires later got dirty. (01:04:27 - 01:09:46)
Other mistake: In the fight at the beginning of the movie, Kim bends over and launches her jet-pack towards the villains. Almost everyone falls down way before the jet comes anywhere near and/or receive no impact, but they are KO as if they took a rocket to the gut. (00:01:40)
Other mistake: Throughout this, a running gag is that Fred can't drive stick/clutch. However, in "What's New, Scooby-Doo?" Series 2, Episode 6 "A Scooby-Doo Halloween," he yells at Shaggy that he's riding the clutch too hard at the beginning of the episode. If the Mystery Machine has a clutch mechanism, he would know how to drive stick/clutch.
Other mistake: Catwoman faces three random guys in the alley, trying to kill Batman. The one with the red jacket first pulls out from his pants a baseball bat (!), then he attacks her with a crowbar. (00:12:20)
Other mistake: At the skate park (which should be Thursday after school), Max says that the necklace he is making for Brixley isn't in the kiln yet. On Friday, after Max's dad tells him he is grounded and Lucas shows up outside of Max's bedroom window, Max tells Lucas that the necklace is still in the kiln. The Good Boys went into the boys' restroom when they got to school and soon left to go to the mall, so there was no time for Max to put the necklace in the kiln - or for him to know that it was in the kiln.