Catnap was way to easily convinced for someone of his dedication to the prototype, Personally the only way I could see catnap turning on the prototype is if we saved him right as he was about to be killed, though that's a big IF, for all we know Catnap knew the prototype was there to make him apart of himself and was willingly offering up himself to the prototype.
I hope we can meet Bobby or Hoppy next since we saw a scene with Bubba. I hope we get a happy ending with the Smiling Critters reuniting at the elevator
People don’t like to believe this, but the Prototype never once commanded Catnap to carry out his murders against “heretics”. That was all a product of Catnap’s own delusions and worship of the Prototype. The Prototype could not and likely did not know how to get through to him, especially due to being old friends with him. Of all the arc villains in Poppy Playtime, Catnap is far and away the least redeemable.
It’s like you don’t even know the characters. It’s a fun animated short but would have never happened, the prototype wouldn’t have called catnap by his experiment name and he wouldn’t have trusted Poppy as she has done nothing for him