I was a big kid too when I was little, and up to a year ago. The kids in school used to try that kind of nonsense with me. I'd leave two kids in the dirt, then no one would try anything for a while. Then some how people forgot, and I'd have to bust another one, and another, and another. I actually miss all the fighting I got to do when I was a little one, all my fighting now is just a legal liability, sad face.
Only got suspended for my first fight, when I left a couple kids crying on the ground and got tackled to the ground by a coach in the sixth grade. Best three days ever!!! Got a new fancy pair of shoes, got to go to Six Flags. After that, the school admin figured out some how, not too hard, that the kids I whooped were long time trouble makers, and I just got sent back to class while their asses got shipped to alternative school.
Good for this fellow. My advise, whoop the first one so thoroughly that no one will ever want to mess with you again. My advise for the bully, if you want to look cool, don't pick on kids you think are weaker than you, that just makes you an Omega dog, take up smoking!!!
You wouldn't think the bully has a case, what physical assault? The big kid would have just the same on him, plus more. His parents ought to teach their little boy a lesson and drop this whole business before it ruins their son's life.