PokéBattle is a supplementary tool meant to be used alongside the popular mobile gaming app Pokémon GO. By using this Java web application, the user can choose their Pokémon and use them to engage in simulated Gym battles against a Pokémon of their choice. After 6 Pokémon of your choice have been selected, you then gain access to over 4000 unique Pokémon moves, which you choose from depending on the Pokémon you have on your roster. Then the simulation runs, calculating damage modifiers and bonuses such as STAB based on your choices.