Released in Japan in 1996 and North America in 1998, Pokémon Blue Version remains a masterpiece of minimalist RPG design. Its enduring appeal lies in a pure, uncluttered loop that modern entries have buried under layers of mechanics.
Start with Bulbasaur (easiest early gyms), learn the Nidoran♂/♀ early-game carry strategy, and enjoy the purest Pokémon loop ever designed.