You can buy Kerfus at the store. Omega kerfus can be created on the desktop in the garage. The book for its creation can be found in a bunker near the base. Look on YouTube how to open it. When you have collected all the details, you can create it, BUT DO NOT FORGET ABOUT the PART OF the COLOR, otherwise you will get a piece of garbage on the legs. As for rgb Kerfus, I can say that he is not in the game and probably this is a joke from the developer.(sorry for my broken English)