Ash's Pidgeot was caught in the episode, Ash Catches a Pokémon as a Pidgeotto in the Viridian Forest. Then when he was heading to Orange Islansd to bring the GS Ball back to Professor Oak as requested on the way, there was a bunch of Pidgey and Pidgeotto that did not get along with some Spearows with a Fearow leading them. It appeared that the Fearow was the very same Spearow that Ash threw a stone at the start of his journey. Then Ash asked his Pidgeotto to convince the Pidgey and Pidgeotto that he wants to help them. When Ash's Pidgeotto was fighting against the Fearow and Spearow, Pidgeotto was hurt and then he suddenly evolved into a Pidgeot. When the Fearow was weak, Ash tried to catch it, but failed to do so. So with the help of Ash's Pikachu, they were able to chase the Fearow away. Then Ash released his Pidgeot to protect the Pidgeotto and Pidgey promising to come back for it after he delivered the GS Ball, a promise he hasn't yet fulfilled.
Note: Season 1 means Generation 1 as well. This is before some moves went through Type changes.
- Pidgeot is the first one of Ash's Pokémon that learned all of its moves in the evolution stage that he caught it in, and evolved later, the other one is Glalie.
- Pidgeot is Ash's first Flying-type caught at the beginning of his journey.
- Megumi Hayashibara who plays Team Rocket's Jessie in the Japanese-language version voices Pidgeotto and Pidgeot in both the Japanese and English versions of the anime.