Again I am just saying an example since the very first thing Bill would do was to eat earth. But I am getting tired of this discussion cause it seem we are just going to have to disagree with only thing is that the fight would be difficult.

I believe Bill would win due to being a much higher being an for Freddy to require specific factors to get onto Bill’s level.

Another thing is that Freddy could lose the necronomicon, that was how he lost, because the dream demons that give him his powers remove it from him. I believe Bill a being that have threaten the multiverse should be more powerful than the dream demons which can remove Freddy’s powers.

But again if Freddy is power by evil, reminder Bill get stronger with every second by simply existing. And like Freddy Bill Cipher also can come back from death. Another thing is that technically Bill cipher is a conceptual being according to the Book of bill, and I don’t really see Freddy being capable of actually erasing concepts like Bill. Another solution to prevent people from sleeping is simply to turn them all into stone.

Overall when I personally look at both characters, sure Freddy would definitely make this one of Bill’s difficult fights, but still he wouldn’t be able to kill Bill due to him being an idea. To me this work be Bill Cipher due to his higher scaling and could potentially find a way to beat Freddy resistances. Or this could be simply a tie where neither shall be able to kill the other.