Prank Idea: Gotta Catch 'Em All
There are over 700 Pokémon these days, and that sounds like more than enough to fill a high school. Print up color pictures (or better yet, get as many friends as possible to get toy Pokémon from thrift stores and yard sales) and hide them everywhere. Then post flyers in every hall that just say, "Gotta catch 'em all!" We can almost grantee that there will be people fighting over rare/difficult to reach toy Pokémon by the end of the day.