Pokémon started as a pair of video games, Pokémon Red Version and Pokémon Green Version, released in Japan for the Nintendo Game Boy in 1996. Players could catch, battle and trade 151 different monsters. Today, there are 721 different kinds of Pokémon to catch, battle and trade as of the release of Pokémon X and Pokémon Y for the Nintendo 3DS in 2013.
For more information, look here!
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