The Fairly OddParents (2001) : 5x28

Remy Buxaplenty has come home from military school for spring break. All he can talk about is how great his new school is, making Timmy, Chester, and AJ very jealous in the process. Timmy decides they should all get to go to Remy’s fancy academy and wishes for three scholarships. Once the boys get to their new school, they find that it is not quite the paradise Remy described -- it’s the exact opposite. The students have to get up before dawn every morning, all the teachers are drill sergeants, and pets are strictly forbidden which means that Timmy’s pet goldfish (a.k.a. Cosmo and Wanda) are confiscated and placed in storage. This of course was Remy’s plan all along, and now that Timmy can’t get to his God Parents, he cannot wish himself out of this nightmare.