Hip and Hop steal hats off two women. Hip takes the yellow hat and Hop takes the pink hat with a green flower. Then when they're running into the building, the yellow hat has a feather on it and the pink hat turns white. Then when they're inside, the flower hat is pink again but the flower is orange. Then in the next shot when Hip and Hop smell something, the flower on the pink hat is green again and the hat with the feather is magenta and so is the feather.
When Hip and Hop are hiding behind a column and overhear the servant complaining about being treated like a dog, Hop's hair is yellow. Then when he trips the servant while trying to rush the duck to the king, his hair is still yellow.
When Hop lunges off the tray towards King Windbag, his hair is yellow.
When King Windbag tries to get his wand from Hop and Hop throws the wand, his hair is yellow.
When a piranha plant comes out of the pipe and shoots spiked balls at Luigi and King Windbag, the balls are black. In the next shot, they are green.
When Hip and Hop are first seen throwing food at people, Hip's head is brown.
On the TV, the news reporter mentions a "red sports car rampaging through Florida." The sports car Hip and Hop are driving is blue, not red.