Pokemon: Why Are All My Pokemon Humanoid?

[Pokemon Fanfiction + One Heroine, Lillie + System + Transmigration + Starting in the Kalos Region] (Reader advisory: This book’s setting is based on the anime, with some possible changes. Pokemon won’t have levels, which makes it closer to the anime and, in my personal opinion, more enjoyable to read. So please don’t apply the game’s rules to it, especially since the author has never played the games. Ash appears in this story. The protagonist will travel with him, but won’t follow the main story the whole time, since he has his own adventures too. I’m a new writer, and this is my first book, so my writing may not be very good, and there are many things I don’t understand yet. I love Pokemon, but I’m not very familiar with the details. I simply enjoy watching the Pokemon anime and reading fanfiction. If you spot any problems, please feel free to leave a comment, and I’ll correct them as soon as I see it.) The protagonist wakes up one day to find he has transmigrated into the world of Pokemon. Like countless other transmigrators, he decides to reach the top of the world and become the strongest Pokémon Trainer. With that goal in mind, he sets off on a journey to catch Pokemon and become a Pokémon Master. But the further he gets, the stranger things become. Why do all his adorable Pokemon eventually evolve into humanoid forms...?