This is a page on all the Pokémon in the series. Levels TBA.
Saur, Red's Venusaur, was Red's starter Pokémon. Red got Saur as a Bulbasaur from Professor Oak after battling it from a Wild Machoke in the Viridian Gym. Professor Oak gave Saur to him because Red learned how to let it use Solarbeam. In the Sevii Islands, it learned Frenzy Plant.
Poli, Red's Poliwrath, was his first Pokémon. Red had Poli when it was a Poliwag. It evolved into a Poliwhirl after saving Red from drowning. Poli also saved Red again in Vermillion City. The Water Stone of Vermillion Habor evolved Poli to a Poliwrath.
Pika, Red's Pikachu, once cause trouble to the citizens of Pewter City.It was stealing food, and kept shocking people. Red came and caught the troublesome Pikachu. It befriended and mated with ChuChu to produce Gold's Pichu. Unlike other Pikachu, Pika learned Surf due to Substitute.
Gyara, Red's Gyarados, was once 's Pokémon, but Team Rocket captured it and made it more fierce.Red caught it and gave it to Misty. Later, when Red needed a Pokémon that knows Surf to go to Cinnabar Island, Misty traded Gyara with Red's Krabby.
When Red met Giovanni (not as the Boss of Team Rocket). Giovanni gave an Old Amber to Red. Later, Red and were battling Moltres. Blaine told Red to run to his lab and resurrect an Aerodactyl from the Old Amber. Since then, Red uses Aero for transportation like flying.
Vui is Red's Espeon. When Vui was an Eevee, it was experimented by Team Rocket, which allowed it to change forms between it's evolutions: Vaporeon, Jolteon, and Flareon respectively. It evolved into an Espeon prior to the Gold, Silver and Crystal arc.