After a failed capture attempt, Red threw an Ultra Ball at Mewtwo and successfully caught it. He then returned home to a dinner with his mother, Blue, and Professor Oak. Realizing his work on the Pokédex was not done yet, Red ventured off to catch the most elusive of all Pokémon, Mew.

What Pokemon did Red catch?

Red continues to complete the Pokédex, capturing the Legendary Birds Zapdos, Articuno and Moltres. Once he captures all 149 Pokémon, Red finds out Blue was seriously injured by an unknown Pokémon and sets out to capture it in Cerulean Cave.

Why was Mew not in Pokemon Red?

Mew wasn't supposed to be there

The infamous 151st Pokemon was never supposed to be included in the first Pokemon games, however. ... It was only because the debug features weren't included in the final version of the game, that Mew could fit in.