In Pokémon Sun and Pokémon Moon, players will be able to choose between the newly discovered Grass- and Flying-type Pokémon Rowlet, Fire-type Litten, and Water-type Popplio. For a Pokémon Trainer, knowing the Pokémon types and how they match up against one another in battle is vital. Grass-type Pokémon are strong against Water types, but weak against Fire types. Fire-type Pokémon are strong against Grass types and weak against Water types. And Water-type Pokémon are strong against Fire types, but weak against Grass types.