I grew up with Cartoon Network and Jetix (the european??even if it was on south america? equivalent of Fox Kids), so saturday morning cartoon was my lifeblood as well as a lot of kids' anime when I had the time. My favorite for sure was Xiaolin Showdown, at least up until the final season since I didn't watch a whole lot of that. I loved the artifacts, the creative battles in every episode, and everyone's fun character development that went all over the place (especially Raimundo, the best Brazilian character rep I can think of from that time).
It's really obvious how much I injected on that show into my creations. Everyone having themed magic, battles through creative use of weird techniques rather than "my power is better", and adventuring to strange locations in a world that just dropped all pretense of realism and went straight for modern magic after a while.