This story is a sequel to Equestria Ninja Girls: Mind Over Mutant
Three beautiful young ladies, one of them, a member of the Hamato clan, the second, a member of the Foot clan, and the third, a member of both. Rarity, Karai and Adagio go on an adventure into a new world with new allies, defeating new enemies, and all while stealing back some goods.
Disclaimer: Neither Darth Wrex, nor I own Equestria Girls, Teenage Mutant Ninja Turtles (2012) or Sly Cooper.