Red finally arrives at the Pokémon League on the Indigo Plateau, where he battles against and defeats the Elite Four. However, he discovers that Blue has beaten him to the title of Pokémon League Champion. In order to obtain the title for himself, Red challenges Blue to a battle. The match boils down to a showdown between Red’s Charizard and Blue’s Blastoise, with Charizard managing to win out. They are then visited by Professor Oak, who immortalizes Red and his Pokémon in the history of league champions. Afterwards, Red continues his journey and manages to catch all 149 known Pokémon. Upon returning home, however, Red learns that Blue was badly beaten by a mysterious Pokémon not listed among those Red encountered. Recalling a diary he encountered during his travels, Red deduces this to be an artificially made Pokémon named Mewtwo. After receiving advice from Oak about the stones Fuji had given him, Red goes to confront Mewtwo, finding it to be incredibly powerful. As both Red and Charizard become determined not to give up, the stones they received—revealed to be Mega Stones—begin to glow, resulting in a Mega Evolution that turns Charizard into Mega Charizard X, allowing them to defeat and capture Mewtwo. Upon realizing there is still a Mew to be found, Red becomes determined to fully complete his Pokédex.