Pokémon Champions' producer Masaaki Hoshino says only "final evolution" Pokémon will be available at launch, possibly with exceptions for some like Pikachu and Eevee.

An interview with the producer of Pokemon Champions revealed that the game will only have final evolutions of Pokemon.

These shinies are great, even if they don’t have meta relevance. It’s pretty rare nowadays to get a hat-wearing Pokémon that can actually evolve, so know that you can totally evolve your party hat ...