I wrote the description for the crossover! Here it is

The Hetalia crew is short on money. America decides that they should go work at Freddy Fazbear's pizza. The portal they create to arrive rips a hole in the fourth wall. A hidden country tries to inform them after they return to their dimension. Unfortunately, she is injured before she can deliver the message. Back at Freddy Fazbear's, Lyn the lynx finds a note backstage of Pirate Cove. A note that will change not just hers, but many other lives around her.