A tanooki is a japanese animal that is a mix between a dog and a raccoon. It's also one of Mario's fans favourite power ups. It allows Mario to both fly and turn into stone
PETA thinks Mario must have skinned it for animal fur, and is now targeting Nintendo's superhero for animal skinning.
Even though no racoons were harmed in the making of Super Mario Brothers 3, PETA believes that Mario is sending the wrong message by saying it's OK to wear animal fur.