Just a smmall idea I had. technically not one piece and harry potter crossovert but get over it.

"Now will our fourth contestant Harry Potter please enter the arena" Bagman shouted.

Out of the tent walked Harry Potter then Harry Potter then Harry Potter... Eventualoy twenty six Harry Potter's were standing there.

"What's going on here?" Dumbledore shouted.

"Ummm he called for Harry Potter so here we are" Harry (scarhead) explained.

"He meant you" Dumbledore said grandfatherly.

"But all of our names came out of the goblet. I would hate for these people to die or lose their magic just because we didn't allow them to compete" Harry said with fake sympathy. "You wouldn't let them suffer would you?"

And that my dear readers is how the Tri-Wizard tournament became the twenty nine wizard tournament.