Honestly, I'd have been more surprised if you told me that Metal Gear Rising didn't have a ninja cat.
Apparently at one point in its production Metal Gear Rising: Revengeance had loads of ninja cats, they would surround Raiden while he did stuff. That would have been pretty cool.
But even though that feature was removed, Platinum Games saw fit to keep at least a couple of cat moments in the game, which can be seen in the video above. The first cat moment, where the feline deftly backflips away from a Raiden sword attack, is pretty hilarious but I would have loved a few more different dodge animations, just to make things extra amazing.
Apparently later in the game the ninja cat appears again.
I, for one, would like to see a game with a ninja dog. Will someone make me this game?