It is Mr.Kat with a 'K' and he is an alien cat and so he comes from a different planet. His planet is in a shape of a cat head and has a ring around it. Has been seen in these episodes. "kid vs kat vs christmas", "fat cat", "beware the werecoop" and you can sorta see it in "trespassers will be persecuted"(when kat is playing with the tv). Some call kat's home planet "planet catnip"