they should put in a sailor moon world in the game
As much fun as that would be (I grew up with Sailor Moon & co.), it's copyrighted. KI would not only need permission from the original creators to use anything from it, but would also have to buy the North American rights, since it's a Japanese anime and was created there.
My duaghter was watching an episode of My Little Pony when I realized the Wizard101 Midnight Pony mount has a striking resemblance to these ponies, especially with the "cutie mark" on its rump. Specifically there is a pony named trixie. Its a baby pony, but google it if you don't believe me! Same cutie mark! Its a unicorn though.