From Bulbapedia, the community-driven Pokémon encyclopedia.
Miyamoto flashes his well-known smile
Shigeru Miyamoto (宮本茂, born November 16, 1952) is a world-famous video game designer and creator, known as the man behind two of Nintendo's most well-known franchises, Super Mario and The Legend of Zelda. He has worked on literally hundreds of games since joining Nintendo, including being behind the initial development of the Pokémon games.
While Satoshi Tajiri had created the idea for Capsule Monsters with longtime friend Ken Sugimori, when the idea for the game was pitched to Nintendo it was rejected initially. Miyamoto, however, took interest in the idea, and over the next five years, Game Freak, alongside Creatures, Inc., another Nintendo developer, created the first Pokémon games, Pokémon Red and Green.
Miyamoto's vision for the series was a phenomenal influence, with the idea of paired versions being his own. Rather than have a single game, to emphasize the trading aspects, players would have to link up with a friend to achieve the ultimate goal of catching them all. For this, the main rival of the Generation I games and their remakes has "Shigeru" on his list of default names, while his anime counterpart is directly named "Shigeru", in Miyamoto's honor.