A crossover in which the Twins get sucked through a magic portal, falling into the land of Ylisse. In order to get back to their world, the Twins must join Chrom's army and defeat Grima. Both of the the twins have Grima's symbol on their left hands, but also have Bill's symbol on their right. What does Bill have to do with this? Well, that will remain a mystery, for now. #gravityfalls #fireemblem #dipper #mabel #chrom #crossover