Also, Mephiles the Dark was able to get away with everything because the writers had to dumb down every single hero. He's not truly evil if he can accomplish things because they are written as idiots. Mephiles is also an idiot but ClementJ642 has already said why Mephiles is an idiot.
Clement hates himself. Not Sonic 06
Also, why does Mephiles want to destroy the universe when wanting to merge with Iblis to become Solaris again. No explanation. I mean he briefly mentioned on how humans were mistreating the universe so maybe they deserve to lose it but thats not a motivation, that's an after thought.
because he's evil and wants to control everything because it's mean.