Gen-I, short for Generation I, refers to the first generation of Pokémon introduced in the popular video game series created by Nintendo and Game Freak. This generation debuted in 1996 with the release of Pokémon Red and Pokémon Green in Japan, featuring 151 unique creatures, including the iconic Pikachu. The Gen-I Pokémon are known for their simple designs and foundational gameplay mechanics, which set the stage for future generations. Players can capture, train, and battle these creatures, forming a core part of the franchise's appeal. The success of Gen-I laid the groundwork for a multi-billion dollar franchise, including games, trading cards, and an animated series.