Curate, connect, and discover
I lost the prompt for this, but it was basically "Danny ends up at Gotham Academy For Reasons, tries to annoy the Lone Sane Man Damian into being friends with him for a week, which ends with Damian dragging this irritation in an alley, giving in to his anger enough to punch him, only to learn that's the best way to start making friends with a ghost." In my version, Vlad has decided to focus more on becoming a Father Figure to Danny and simultaneously working to undermine his position as Phantom, starting with stepping down as mayor, moving to Gotham, and convincing Maddie and Jack to allow him to fund Danny's entry into the prestigious Gotham Academy where Danny could get the academic support he needs to succeed, pointing out Danny's abysmal grades and attendance as proof of this necessity. They agree, sign temporary guardianship over to Vlad, and Danny is forcibly sent to the preppiest school in New Jersey.
He doesn't fit in with the rich crowd because he gives off strong middle class vibes. He doesn't fit in with the scholarship crowd because, though he's smart, his study skills have gone to crap and his entry grades are only accepted because Vlad had the money to pay for his tuition, and most everyone in between is put off because, if he was considered weird in Amity, he's seen as a freak here. In Gotham, that translates to potential rogue, so even the teachers treat him with suspicion (ignore that this is the best way to push Danny into roguedom. We're going for realism, not how troubled kids should be treated to ensure they grow up feeling loved and not in need of villainous coping mechanisms).
The only one that treats him neutrally and has, when the bullying escalated (to a level of annoyance for him) defended Danny is a kid with Middle Eastern features he learns, with some work, is named Damian. Damian lets him eat with him. Damian is effortlessly cool without being a bully. Damian is even liminal! That's all Danny needs to start thinking maybe, just maybe, he could become friends with the one guy that tolerates him sitting at the same lunch table. He's made friends with more prickly people, after all!