According to lore, Mew is considered the first Pokémon created. It is widely speculated by the scientists in the Pokémon world that Mew holds the key to DNA, containing the concept DNA of every single Pokémon in existence.
Mew is a legendary psychic Pokémon that first appeared in Pokemon Red and Blue Versions.
In the American versions of the games, Mew has only been able to be caught normally in Pokémon Emerald, and was otherwise available as a special download from a Nintendo Event or a glitch in the original Pokemon games.
In-game, Mew is known for being able to learn any HM or TM moves. Mew appears as a pink cat-like creature with bright blue eyes. Mew's special abilities include the ablity to float, turn invisible, create psychic force fields, and transform into any of the other 493 Pokémon. According to the Pokedex, its number is set at 151.
Mew is a rare sight to see in the game's series