Contract Summoning of Spirit Beasts, but Why Are They Pokemon?

I transmigrated to a world of beast tamers, where humans form contracts with strange beasts to fight other beasts. But I summoned Pokemon.

Facing a surging beast tide, I climbed onto the city wall and resolved to protect the countless homes behind me. Without hesitation, I hurled a Poke Ball.

“Go, Pikachu! Use Tackle!”

Faced with a rock giant as tall as a mountain, Pikachu glanced back at me...

“Pika?”