In Pokémon games, battles occur between trainers using their Pokémon. Each Pokémon has a type, such as Fire or Water, which influences its strengths and weaknesses against other types. Players choose moves for their Pokémon to use, and the effectiveness of these moves can vary based on type matchups. Turn order in battles is determined by the Speed stat of the Pokémon. Players can also use items to heal or boost their Pokémon's abilities. Winning battles earns experience points, allowing Pokémon to level up and potentially evolve into stronger forms.