Pokémon Shuffle is a freemium puzzle video game developed by Genius Sonority and published by Nintendo and The Pokémon Company for the Nintendo 3DS. The game which is a spin-off of the Pokémon series and is similar in gameplay to Pokémon Battle Trozei was released worldwide on the Nintendo eShop on February 18 2015. Pokémon Shuffle Mobile a version for Android and iOS devices was released in August 2015. Pokémon Shuffle similar to Pokémon Battle Trozei is a puzzle game in which players fight against various Pokémon by matching three or more of the same Pokémon from the Kanto Johto Hoenn Sinnoh Unova Kalos and Alola regions on their bottom of their screen. Players accomplish this by swapping around Pokémon on the bottom of their screen. Players can take up to four support Pokémon with them some of which can deal additional damage depending on their type (e.g. matching water-type Pokémon causes extra damage to fire-based opponents). Players progress through each stage by defeating the opposing Pokémon within a set number of moves after which the player receives in-game coins and their Pokémon gain experience. Upon clearing a stage players will have a chance to catch the Pokémon; the quicker the player defeats a Pokémon the higher probability they have of catching it. If the player fails to catch it with their first Pokéball they can spend coins to use Great Balls with a doubled chance of success or retry the stage at a later date. Defeating Pokémon trainers earns Mega Stones which allow certain Pokémon (if they have been successfully caught) to undergo Mega Evolution once a player has matched enough of them during a stage granting bonus effects when matched. Players can also unlock Expert levels which require the player to defeat a Pokémon within a time limit using unlimited moves.