"Nyan Cat is a CAT (Obviously) But, as you noticed, Cats don't zoom through space omnomming on cakes. So please don't put a cat on a rocket. It can't fly."
This category contains nyan cats and no other species of nyan creature.
The cat can be any fur color, have any body, method of flight, can fly anywhere, if it is Space or not, and have any song, flying icon etc.
As long as it is a cat, it can go here. Game Based Cats and Robot cats still count.
Other nyan animals fit in the Non-Cats Category.