The Purple Dragons

The Purple Dragons are a criminal origination of New York lead by Hun and one of the enemies in Teenage  Mutant Ninja Turtles (2003).

Once a gang of street thugs, the Dragons become more organized and equipped with advance weaponry. But they are no allies to The Foot or Shredder, despite their leader being a member of The Foot.

Trivia:

 * The Purple Dragons will be Jaden and Jeffrey's enemies in Jaden, Jeffrey & Friends Storm Adventures of Teenage Mutant Ninja Turtles (2003).