I remember really liking Xiaolin Showdown as a kid. The concept alone is so dope.
I've only seen a few clips here and there of most of the shows being mentioned. For Xiaolin Showdown, I remember a scene that was something like:
Kid w/ cowboy hat: "Your plan is half-baked."
Yellow kid, earnestly: "It's not-at-all baked!"
I dunno why that stuck with me.