GnomeBob
It just occurred to me that in the Marvel comic of yore (back when I read them regularly) the premier university in NYC was Empire State University. That was were Peter Parker was a grad student, where Richards and Doom met, and Emma Frost attended. Richard "Nova" Rider, Felicity "Black Cat" Harding, and Doreen "Squirrel Girl" Green all were students.
easy prank idea would be to replace the chairs (and or desk) with hard light constructs and then turn them off in the middle of class. I think it would make for a good entry level prank if you hadn't already thought of it. Another idea could be a hard light projection of Harry that slowly changes proportions over the course of the class until either someone mentions it or he looks grotesque (bonus points if he could make it visible to only one student while everyone else saw him normally.)
Hey, I got a great idea for the light saber project prank. On the day of judging the project say Harry has invited a special guest, and in comes baby Yoda sipping a cup of hot chocolate. Then whenever someone is demonstrating a light saber have the *whuum sound effect replaced by the mooing of a cow. I can already see the look on Doom's face when his light saber goes mooooo and baby Yoda and Harry giggle in the background and fist bump.
Naruto's chalk above the door prank prank foods then if they steal bad things will happen pranks in cabinets that he says have important things pranks if trying to hack computer backfire different colored hair fantasy Zelda themed the entire campus has students go to an adventure to get their homework back have a gun shootout zombie field campus theme (nonlethal of course) and if the students win they get food by five star gourmet chefs for a month get recordings evidence of a bunch of small misdeeds of students and make them go through obstacle courses to get them back and if not they'll get in trouble paintball fight with a huge grand prize anything Harry can do from grant money to funding a project of theirs to a million bucks anything and everything as long as it's not too much or amoral water ball fight campus wide led by teachers and students whoever wins the war may ask same thing as paintball fight Halloween mansion during Halloween will participate in non-lethal fighting to gain candies think of like a Halloween dungeon except for classes gunners swordsman's buffers/healers and shieldberers if they win Grand feast if they lose a Grand Prank battle of love couples will duke it out over over 10 spots and five grand prizes the 10 spots will gain 20 dates paid for by Harry or even hosted by him the five top spots will get 25 dates sponsored by him and if they happen to marry it is fully paid for by Harry