Professor Oak sent out his Fearow when it still was a Spearow in a battle against Green and her Jigglypuff. Spearow used Fury Attack on them and Jiggly tries to use Sing on Spearow but failed. Green then sent out her Blasty and used Hydro Pump but Spearow used Mirror Move and was able to use Hydro Pump aswell. Spearow was able to attack Green's Pokémon enough to give Professor Oak the win.
Spearow was revealed to have evolved into Fearow when Orm attacked Professor Oak. Professor Oak called Fearow and his Kangaskhan to stop Orm and his army of Shuckle but they were both defeated easily.