Big Mouth and Kootie Pie steal the Doom Ship to head to Hollywood. In the first shot of the ship when it hits Mario and Toad, the ship is gray.
When Kootie Pie and Big Mouth hug each other and spin after seeing Madzilla for the first time, their shells are green.
When Madzilla picks up a pink car off the highway, a blue car coming into the shot turns pink.
In one of the frames where Madzilla grabs Big Mouth and Kootie Pie to put them into the car, his hand is partially behind the car.
In the first shot of the drainage channel with all the pipes spilling water out before Mario, Luigi, the princess, and Toad arrive, the water is not moving.
When Kootie Pie and Big Mouth are throwing their concert, there are several shots where their lips aren't moving nor matching the dialogue.