GXP3000
Alligator in the North
I'm not sure how this became a thing, but there's an instance where co-op games can crash whenever there is a Tails player carrying another when someone is about to grab the last blue sphere. I tested this out myself at least in split-screen, since it allows access to the MP Special Stages, and attempted this at least four times. Out of all four times I had attempted it, the game crashed four times. I'm not sure what it is, but it might be an issue with the carrying state.