- Actor Allusion: Jennifer Hale playing a cat-like cat burglar.
- All-Star Cast: The show has some of Western Animation's most famous voice acting names in it: Tom Kenny, Jeff Bennett, Tara Strong, Grey DeLisle, Wayne Knight, Danny Cooksey, Maurice LaMarche, Jason Marsden, Jennifer Hale, Kevin Michael Richardson, Susan Silo...
- Cross-Dressing Voices:
- Tara Strong as Omi. This is played straight for him in most languages. Except Italian, where Omi is played by Davide "Ash" Garbolino, Romanian, where he is voiced by Paul "Ben 10" Zurbău, and Brazilian Portuguese, where he is voiced by Erick "Aang" Bougleux.
- Jeff Bennett also played Clay's sister, Jesse.
- Fake Nationality: All of the main cast are voiced by white Americans; barring Clay (a white boy from Texas), none of the monks share their voice actors' race or nationality.
- Just For Fun: As most of you know, Tom Kenny is Raimundo and Hannibal Roy Bean. However, he also voices:
- Grand Master Dashi
- The street thugs in "My Homey Omi"
- The random Chinese man in "Pandatown"
- The Treasure of the Blind Swordsman
- And many more... keep adding them as you recognize them!
- Name's the Same: No Jack Spicer, evil boy genius, is not a poet from the San Francisco Renaissance.
- This Omi is not the "Cheerleader" singer.
- This Chase Young is not the former Ohio State and current NFL defensive back.
- The Other Darrin: During the first season, Master Fung was voiced by René Auberjonois. Then in seasons 2 and 3, he was replaced by Maurice LaMarche.
- Playing Against Type: Jason Marsden as Chase Young.
- Recast as a Regular: Maurice LaMarche guest starred a couple times in Season 1 as Tubbimura and then took over as Master Fung in Seasons 2 and 3.
- Screwed by the Network: Cartoon Network Australia quietly cancelled showings of Xiaolin Showdown after Season 2 finished airing. Season 3 would not air in the country until 2009, four years later and on the channel Boomerang as well, meaning that Australian fans were left for that entire time thinking the show ended with Omi trapped working on the side of evil.
- Shout-Out: Hannibal Roy Bean is thought to be named after Hannibal Lecter from Silence of the Lambs, with him as a bean being a reference to a line in the book about Hannibal eating a man's liver with some fava beans.
- Talking to Himself: Taken Up to Eleven since the series was voiced by incredibly well-recognized and prolific voice actors, as all four of the main character's voice actors - Tom Kenny, Jeff Bennett, Tara Strong, and Grey DeLisle - also voice multiple background characters and one-off villains. Even Maurice LaMarche gets in on the Talking to Himself action. See the character page for details.
- In Venezuela, Omi and Wuya share a voice.
- The Wiki Rule: Xiaolinpedia.
Trivia / Xiaolin Showdown