@Holy SoldierSorry about that, I have a job now so I don't have as much time to post, plus I got super got up in making a CS for another Roleplay I'm in. Anyway, my reasoning for why the police wouldn't get involved is simply because I don't think anyone's would be paying much attention. I should've written this in, but Max and Jaden are some distance away from the crowd or else Max would've just walked up to Seth and brought him over. As far as I can tell, most people would be paying attention to the crowd in front of the Pokemon club, plus I didn't get the feeling that their were many other people out and about myself from what I read. Second, both times Jaden got attacked, he hardly made a sound, and there were very little outside observers close enough who could read it as an attack. In fact, the first thing could've been read as Max soothing Jaden's headache(which is wrapped up in bandages still, not to mention he got punched as well) with a painful initial touch that dies down. The second one would be worrisome, but again, brain injury could be used to explain him falling down from a distance, and most people would just think Max was just an asshole if anything.
Nothing that is currently observable by anyone but Seth could be seen could be undeniably labeled as an attack by a passing bystander, and even if it looks shady, people tend to just ignore that kind of stuff if no one else calls them on it(The Bystander Effect). Even if you have the police come over, Jaden sure as hell isn't going to say anything, nor his pokemon, and
@Saltwater Thief can correct me on this if I'm wrong, but I doubt Seth would either given the circumstances. It'd likely just make things a lot worse for Jaden in his eyes (and believe me, it would) and put him on the shit list of a powerful Psychic Pokemon that clearly willing to attack and injure somebody he knows and is related to in someway. You could only imagine what he'd do to a random stranger that tried to rat him out.