"Pocket Monsters: Red (Japanese: ポケットモンスター 赤) and Pocket Monsters: Green (Japanese: ポケットモンスター 緑) were the first Pokémon games ever released to the public, in Japan on February 27, 1996. Introducing the gameplay concepts that went on to provide the standard for games in the main series games, these games were eventually localized and released worldwide as Pokémon Red and Blue Versions, using a combination of the engine from Pocket Monsters: Blue (Japanese: ポケットモンスター 青) and the obtainable Pokémon from Red & Green. Much as would become standard, Red & Green were later joined by a third version, Blue, which slightly improved upon their features and provided the code for the international releases of Red and Blue, and eventually Pocket Monsters: Pikachu (Japanese: ポケットモンスター ピカチュウ), a fourth version based on the anime." -- Bulbapedia
To celebrate this occasion, I'm presenting you a feature of Fan Art based on these games that started one of the biggest fandoms on deviantART and the internet!