Legendary Pokémon

The gameplay of the Pokémon video game series involves the capturing and training of a variety of fictional creatures called "Pokémon" and using them to battle other trainers. Each successive generation of games builds upon this concept by introducing new Pokémon, items, and gameplay concepts. Some of the general concepts were featured elsewhere before being introduced in the games; double battles appeared in the anime long before appearing in the games, and Pokémon abilities are similar to the Pokémon Powers introduced in the Pokémon Trading Card Game, which also introduced Shiny Pokémon different colors of that type of the original Pokémon

Each of the games in the handheld Pokémon RPG series, from the first games in 1996 to the latest ones in 2016, takes place in a particular fictional region of the Pokémon world, and begins with the player receiving a Starter Pokémon from that region's Pokémon Professor. By traveling around the world, capturing and evolving Pokémon, and defeating other trainers in battle, the player increases the size and strength of his or her Pokémon collection. A major subplot of each game is to defeat a criminal organization trying to take over the world through the misuse of Pokémon. These organizations include Team Rocket, Team Magma and Team Aqua, Team Galactic, Team Plasma, Team Flare, and Team Skull/Aether Foundation.

...
Wikipedia