In this series, we embark on an epic crossover adventure between Pokémon and Ben 10! The Hoenn region has been strangely mutated by a cosmic comet, transforming wild Pokémon into over 400 bizarre alien-fused hybrid forms. Play along as we step into the shoes of Ben and Gwen, explore this mutated world, utilize the DexNav to track down normal species, and battle randomized trainers to unlock the legendary Ultimatrix!