This is the Host Club(and Renge) as ponies.
Tamaki is the blue Unicorn pony and his cutie mark is a rose.
Haruhi is the violet Pegasus pony and her cutie mark has male and female symbols.
Hani is the light pink Pegasus pony and his cutie mark is Usa-chan.
Mori is the gray Pegasus pony and his cutie mark is a knife(it was supposed to be a samurai sword, but oh well).
Hikaru and Kaoru are the yellow Earth ponies and their cutie marks are devils.
Kyouya is the dark green Earth pony and his cutie mark is a clipboard.
Renge is the darker pink Unicorn pony and her cutie mark is a video game case.
EDIT: I FINALLY figured out how to use the scanner on my printer.
Ouran belongs to Bisco Hatori
MLP:FiM belongs to Lauren Faust
I own the art