Following up on a tip from a mysterious Trainer, Liko, Roy, and Dot head into the woods to search for a Pokémon called “the Otherworldly.” They soon encounter three other students who are fleeing from a violent, unidentified Pokémon, but the other students are too scared to provide much help. Pressing on, Liko and friends find a troop of angry Mankey and Primeape, as well as an Annihilape who must be the Otherworldly! With Hatenna’s help, the Trainers figure out that a broken vine is the source of the wild Pokémon’s rage, so they work together to fix it, but the resulting peace and quiet doesn’t last long… (thetvdb.com)