Pokémon: Fusion Era

[This is a fan fiction, only the first 6 generations of Pokémon, no Gigantamax, and only in the Kalos region. Traveling to the parallel Pokémon universe, Shi An found himself facing a completely different era—— Here, Mega evolution is a symbol of peak power, and super Gigantamax has never existed. Here, Ash is already the World League Champion. Here, humans can gain strength by transplanting Pokémon organs and become half-human, half-animal "chimeras." Some people go crazy for power, some hunt Pokémon for profit, and some Pokémon hate humans because of this. So when An began his journey as a trainer, he had to answer one question: When the boundaries between humans and Pokémon begin to blur, which side am I on?