Affiliate Marketing Secrets

Let’s say hypothetically me and this kid have been giving each other glances and talking trash to each other for a couple of weeks possible maybe like 2 months. If we both agree to meet somewhere like at a friends house and fight and he throws the first punch could either of us get in trouble (like with the law), also what would the differences in the punishments be in the following, one time I come unarmed and beat him badly no broken bones just hurt and bruised, second if I brought a pair of knuckle dusters ( brass knuckles) and really hurt the kid like couple of broken bones. I want to just know (I dont even own a pair of knuckel dusters) cant get them here illegal to even own. Any help appreciated but someone who is affiliated with the law would be best thank you.