Other mistake: Right before the diamondius falls on top of the cage, there is a shot of Sonic and Tails holding on to the cage bars. In this shot, Sonic's arms are incorrectly coloured blue. In the next shot, they are tan again as they should be. (00:13:49)
Other mistake: While Sonic and Tails are locked up in old Spelunk's cage during the cave-in, right before the huge diamondius crashes on top of the cage, there's a close-up of Sonic holding the bars, and the color of his torso becomes the same as the background mid-shot.
