Rock of Ages 3: Make & Break

First, you need to unlock him in story mode by obtaining stars (around 50).

To beat him easily, change your difficulty to easy from the main menu options. During the fight, stay a few feet away from him, then double jump and press (away, away, towards) to do a dash and try to hit him in the head. If you miss, just keep trying. Sometimes he will punch you while you are dashing, but that’s OK. If he launches up in the air, just dash away so you don’t get hit.

Finish two rounds and you’ve won.