Each Pokémon has six core stats: HP, Attack, Defense, Special Attack, Special Defense, and Speed. These determine their effectiveness in battle. Natures further influence these stats, boosting one by 10% and lowering another by 10%. For example, an Adamant Nature boosts Attack and lowers Special Attack. Consider your Pokémon's role when choosing a Nature.
You can change a Pokémon's Nature using a Mint, purchased from the General Store or found in Space-Time Distortions. This allows for greater customization of your team.