Undertale : Broken!Timelines

I'm a teenager full of determination to make a FANGAME! WITHOUT ANY KIND OF KNOWLEDGE! , I KNOW I CAN... , anyway this project has a short story... : One day W.D gaster... fused with the game code waiting for something in the void... realizes that the multiverses and timelines have come together (most of them), then he needs help from someone but doesn't know who... until he remembers an old friend Error! 404 sans, he makes a deal with error404, error 404 will bring him out of the void and give him any kind of power he wanted and also souls, but in return he had to fix the underground, some parts like the ruins will be from another universe!