I found something cool btw in Diddy Kong Racing a bit ago. There's a debug message, if you mess up your setup, and accidentally add two checkpoints of the same number. As the level is saying "GET READY", if you press A, it will flash a message. It's the only instance of a DKR debug message left in!
See attached pic, or try it yourself using:
http://goldeneyevault.com/priv/DKRTe...pointError.ips
Go to Ancient Lake to try it, before it says GET READY. It only flashes briefly.