Beauty is Only Crystal Deep!

A new Ultra Beast, Pheromosa, has appeared and started attacking trainers and stealing their Z-Crystals. The Ultra Guardians are tasked with stopping Pheromosa. Pheromosa steals Team Rocket's Z-Crystals, but while trying to stop it Meowth falls in love with Pheromosa. Will anybody be able to stop it before it's too late?