With the introduction of Pokémon breeding, Pokémon are assigned to one or two breeding groups. When a male and female Pokémon that share at least one breeding group are left at a Pokémon Daycare, they may produce an egg, which will hatch into a young Pokémon.[12] The young Pokémon will inherit the species of its mother, and moves from its father. However, legendary Pokémon, among certain other species, cannot breed.[13]