Here's our list of the 10 Pokémon Ash caught and basically abandoned. PrimeapeEpisode of Pokémon series featuring Primeape The Pokémon Company InternationalFirst caught in the episode "Primeape Goes Bananas," Primeape was an aggressive Pokémon who loved nothing more than fighting. GreninjaThe first Pokémon caught by Ash in the Kalos region, Greninja had a tough start in life. PidgeotAsh and Pidgeot in Pokémon series The Pokémon Company InternationalAsh captured Pidgeot as a Pidgeotto during the episode "Ash Catches a Pokémon." The second Pokémon Ash ever caught, Pidgeot had every reason to assume that Ash would return right away.