Five Nights at Candy's Wiki
Five Nights at Candy's Wiki

So, on RAT's page and gallery, 

Minigame

 people say this is RAT and that he killed the Twins. I feel like this went unnoticed so here's this. This minigame character is not RAT, its CAT. CAT caught the twins and killed the Twins. Meaning, CAT is the Twin Killer

RATCATConveyor

 as you can see. RAT is near the conveyor belt. And do I have to talk about his look, the tail, the ears and the snout and nose and the dark color. There. Done.