The Silph Road has shared code pointing to the gender ratios of every generation-three Pokémon in Pokémon GO. However, among the data entries are two glaring mistakes regarding the exclusively male Latios and its female counterpart, Latias. Pokémon GO developer Niantic somehow swapped this defining detail within Pokémon GO’s code. Based on what The Silph Road community dug up, Pokémon GO’s Latios is 100 percent female, while Latias is 100 percent male.
Source: Polygon