Board Thread:Questions and Answers/@comment-27327020-20160404174206/@comment-32948273-20160417095251

Just because he never attacks doesn't make his AT irrelevant. He likely knew he couldn't win, and just wanted to frighten the player/chara/frisk/whatever

By the end of the Genocide route Chara can destroy an entire multiverse, that's weaker than Asgore apparently.

But for the weakest ones

Weakest: Frisk (physically)

Second weakest: Sans (physically)

3rd weakest: MK

4th weakest: Froggit