Pokemon Red and Pokemon Blue were released on February 7th 1996 and were originally released as Red and Green.Pokémon Red and Blue take place in the region of Kanto. This is one distinct region shown in later games, with different geographical habitats for the 151 existing Pokémon species, along with human-populated towns and cities, and Routes connecting locations with one another. Some areas are only accessible once the player learns a special ability or gains a special item. Areas in which the player can catch Pokémon range from caves to the sea, where the kinds of Pokémon available to catch varies. For example, Tentacool can only be caught either through fishing or when the player is in a body of water, while Zubat can only be caught in a cave.
After venturing alone into deep grass, a voice warns the player to stop in which is revealed to be Professor Oak, a famous Pokémon researcher. Professor Oak explains to the player that wild Pokémon may be living there, and encountering them alone can be very dangerous. He takes the player to his laboratory where the player meets Oak's grandson, a rival aspiringPokémon Trainer. The player and the rival are both instructed to select a starter Pokémon for their travels out of Bulbasaur, Squirtle, and Charmander. Oak's Grandson will always choose the Pokémon which is stronger against the player's starting Pokémon. He will then challenge the player to a Pokémon battle with their newly obtained Pokémon, and will continue to battle the player at certain points throughout the games.
While visiting the region's cities, the player will encounter special establishments called Gyms. Inside these buildings are Gym Leaders, each of whom the player must defeat in a Pokémon battle to obtain a total of eight Gym Badges. Once the badges are acquired, the player is given permission to enter the Pokémon League, which consists of the best Pokémon trainers in the region. There the player will battle the Elite Four and finally the newChampion: the player's rival. Also, throughout the game the player will have to battle against the forces of Team Rocket, a criminal organization that abuses Pokémon. They devise numerous plans for stealing rare Pokémon, which the player must foil.