Fearow (anime)

Fearow is a wild /-type Pokémon who appeared a couple times in the anime.

Kanto
When Ash started his journey and Pikachu disobeyed him, he threw a stone onto a Fearow. Fearow was enraged and attacked them, then summoned others to chase Ash and Pikachu off.

Later, when Ash, Brock and Misty went to Orange Islands, they encountered a Fearow, who evolved and attacked a flock of Pidgey. It still did not forgive Ash and Pikachu and attacked them. Ash decided to fight it back, as his Pidgeotto evolved into a Pidgeot. Fearow went off, while Ash released Pidgeot to protect Pidgey, in case Fearow would return.

Sinnoh
When the clown lured Ash, Dawn and Barry in, each one had their memories how they started their journey. Ash remembered a bunch of Spearow attacking him, though he escaped with Pikachu.