The succesor (MHA)

Chara had won.

Even with the power that could be comparable to that of a god the human's overwhelming DETERMINATION was too much for Sans to handle, it would seem that even with the 6 Human souls there truly was no hope when it came to beating the first fallen.

Sonic

Despair. There's nothing left to save. What else can he do? Keep fighting in a war where no one wins. He felt pathetic, powerless. There was truly no hope to be found in battling the doctor when there was nothing left to gain. He was just too slow.

Enter Izuku Midoriya

No OFA as gear shift is too op when in combination with Sonic's speed and Melissa gets it.
Picture would be changed once I get my hands on a drawing tablet after I lost my old one from a flood.