Polo leaves his hateful hometown after saving Dina. He registers as a Pokémon Trainer (“dresser” was the nurse’s warm slip – she means Trainer) with one goal: catch the unwanted, turn them into champions, defeat Ash in battle, and build the world’s biggest sanctuary for misfit Pokémon. Dina’s tribe was kidnapped by Team Riot; her story unfolds across seasons. The tone mixes slice-of-life friendship, intense battles, and emotional growth. Every season ends with a major Team Riot cliffhanger.