The Pokémon video game series is a set of role-playing video games based on the Japanese Pokémon franchise. It begins on February 27, 1996 in Japan with the release of Pocket Monsters Green and Red. The duo of games was so successful that it was successively declined in two other versions (blue version and yellow version), then translated throughout the world. In total, the gaming duo sold more than 31 million copies, making it the second best selling video game in 1999. Thanks to this record number of sales, the Pokémania was launched. While the developer Game Freak saw himself designing Pokémon until the second generation including Pokémon Gold, Silver and Crystal in the early 2000s, the team continued. In the main games on Nintendo's portable console, Pokémon Ruby, Sapphire and Emerald released in 2002, followed by Pokémon Diamond and Pearl in 2006, Pokémon Black and White in 2010, Pokémon Black 2 and White 2 in 2012, Pokémon X and Y in 2013, Pokémon Sun and Moon in 2016 and Pokémon Ultra-Sun and Ultra-Moon in 2017. Three reissues also released in 2004, 2009 and 2014 and are respectively named Fire Red Pokémon and Green Leaf, Pokémon Gold HeartGold and Silver SoulSilver and Pokémon Omega Ruby and Alpha Sapphire. This is one of the most prolific sales series of all time, having sold more than 215 million copies in October 2010 and counting sales of the black and white versions of the series. , released in late 2010 in Japan and early 2011 in the rest of the world.