The students all make/buy hogwarts robes.
Horned serpent take ravenclaw
Pukwudgies take hufflepuff
Wampus take gryffindor
And thunderbird, after a lot of complaining, take slytherin (they wanted ravenclaw)
The students do nothing but wear these robes on April fools day, fake British accents, print out and tape the hogwarts house emblems onto the entrances of their common rooms, and mumble about how Harry Potter is always fucking up their education.
The teachers were very confused.