Being the new kid in a Southern California town, 14-year-old Daniel becomes a red-hot target of a group of bullies who study karate at the Cobra Kai dojo. At school, Daniel grows close with Ali Mills, an attractive cheerleader, which grabs the attention of her arrogant ex-boyfriend, Johnny Lawrence, who is also a skilled practitioner of the unethical and dangerous form of karate. Johnny and his gang torment Daniel and continuously beat him up, until Kesuke Miyagi, the handyman at Daniel’s apartment, intervenes and single-handedly defeats all five bullies in the famous Halloween fight scene.

Source: https://www.familyminded.com/s/films-that-address-bullying-ddec43ba70514de0