And a lot of them Say Rimuru wins because of he's hax and others says Xeno goku wins because Keysword and other stuff but they say Rimuru has Hax to counter that and be immune blah blah blah. The point is, i want this to be a perfect explaination of who wins so i can Show these people that Debate over this, who truly wins with Evidence.
CC Goku out scales and overpowers Rimuru. He can nullify attacks with his time power, resisted existence erasure from the universe tree, absorbed Tokitoki who gave complete and utter control over time and space.
Rimuru is like the world-destroying dragon that doesn't realize he is the world-destroying dragon. His self-deprecating attitude makes him seem weak when he is overwhelmingly strong. As far as "Diablo" being stronger than him, there is no clear-cut answer to this question. I don't believe anyone can answer with absolute certainty.
Anyway jokes aside, it depends on which version you're talking about. Anime and current manga version of Rimuru is somewhere between large country to low continental level. While his light novel version is star level. And his web novel version is a multiversal god. And yes I'm a power scaling nerd. Reply reply nitoreagan •
So now for the conclusion, rimuru being multiverse has been debunked, rimuru being able to destroy infinite multiverses and infinite dimensions infinite times over due to infinite clones, rimuru transcending space and time, rimuru being above the great sprit of time which is the concept of time, his memories transcending space and time, and ...
Rimuru has no secret or anything he doesnt know, i like the theory of rimuru being born super early but without ego, just a rampaging monster so veldanava sent him to the reincarnation cycle, prolly even predicting future events so rimuru spawns and everything happens.
Rimuru's transition between worlds supercharged this skill, turning it into "predator". His dying wish, kind of misunderstood, to become a sage in his past life gave him the sage/great sage skills. The real game-changer for Rimuru is how "predator" and "great sage" work so well together.
Raphael made backups of Belzebuth and forced rimuru to take Melt Slash head on so that she could analyze the randomness of the "holy" particles, which then allow rimuru to gain some kind of immunity, what rimuru understand later is that when he was about to receive Melt Slash, he "wished" to be able to use it, which is why raphael did that.
Demons serve only the powerful. Rimuru is endless power. So naturally, he feels drawn to Rimuru. If Rimuru did lose power, I don't think it would be far-fetched to sy that Diablo would see Rimuru in a lesser light.