Pokémon. Pocketal Monsters. Pokémon are the predators. Or prey. Or humans are the prey. Basically, Pokémon (or Digimon!) come here to eat other Pokémon (or Digimon, or humans). I mean, we all get hungry, don't we? And we all have our place on the food chain. And those that are lower on the tier must know their place inside the bigger fish.
It's Pokémon and vore. Pokévore.