Brock captured Crobat as a Zubat when he spotted it on his way through Mt. Moon in Clefairy and the Moon Stone, but its capture was not seen on screen. He later sent out Zubat to battle Team Rocket. He rarely used Zubat for direct combat, instead focusing on confusing opponents with Supersonic.
In Johto, Brock encountered a doctor who had a female Zubat. Brock used his Zubat in a fight against Team Rocket. While battling, Zubat evolved into a Golbat. Brock's Golbat was only a Golbat for a short period of time. He soon evolved into a Crobat in another battle with Team Rocket.