Pokemon X and Pokemon Y — Like previous games in the series, in Pokémon X and Y the player controls a Pokémon trainer who travels through the game world, catching creatures called Pokémon, and using them to fight against other trainers. After defeating an enemy Pokémon in turn-based combat, the player's Pokémon gains experience points; Having collected a certain number of them, he rises to a new level. Upon reaching a certain level, many Pokemon can evolve — turn into their more developed forms. The player has the opportunity to catch Pokémon found during random encounters. Players can battle or trade Pokémon among themselves using the Nintendo 3DS multiplayer features. Each version of the game has unique Pokémon not found in the other; To collect everyone, players are forced to exchange Pokemon.