The one that I remember best was restricting eating food outside of the cafeteria. Previously it had been allowed to eat outside (the school had a patio area out where kids would wait for the busses, right outside the cafeteria), but there'd been issues with people leaving trash and things out there. The options on the ballot as I remember them were to continue to allow it with no change, to allow it but to implement strict punishments for anyone caught leaving trash around, or to just ban it entirely, and surprisingly 'Ban it' ended up winning, but it was really close. There was a group of students really pushing hard for that; they made posters with pictures of garbage and whatnot outside on the patio area and posted them all around, and got enough support to make it happen.
The student council got to decide the items that went on the ballot and the choices (probably with some faculty pressure for certain things, I imagine), so it was all student-led initiatives, which was neat.
This is a weird patent; it seems to be describing something more akin to Pokemon Home than an actual in-game mechanic, but then the references talk about the pokemon storage system, so who knows?