Altera is a wild and diverse region that overflows with abundance as well as danger. It is also the only place in the Pokémon world that emanates large amounts of Flux energy, a potent resource that has many uses. The value and power of this resource led to rapid economic growth of the region. However, shortly after humans began tapping into Flux energy for power, reports started to emerge about vicious, powered-up Pokémon appearing: the Alter Pokémon.