As with all Pokémon role-playing games released for handheld consoles, FireRed and LeafGreen are in third-person, overhead perspective. The main screen is an overworld, in which the player navigates the protagonist. Here a menu interface may be accessed, in which the player may configure his or her Pokémon, items, and gameplay settings. When the player encounters a wild Pokémon or is challenged by a trainer, the screen switches to a turn-based battle screen that displays the player's Pokémon and the engaged Pokémon. During a battle, the player may select a move for his or her Pokémon to perform, use an item, switch his or her active Pokémon, or attempt to flee. All Pokémon have hit points (HP); when a Pokémon's HP is reduced to zero, it faints and can no longer battle until it is revived. Once an enemy Pokémon faints, all of the player's Pokémon involved in the battle receive a certain amount of experience points (EXP). After accumulating enough EXP, a Pokémon may level up.