With Ash currently 3 to 1 up against Mandi, it was all up to Golbat to score a comeback in the first round of the Kanto Pokémon League. Ash had stuck with his Kingler that had defeated Mandi's Exeguttor and Seadra previously.
Golbat used its speed effectively against Kingler and managed to avoid its Vicegrip attack. Once Golbat had found some space it used a Wing Attack which slammed Kingler onto one of the platforms above water-level. Mandi order Golbat to use Mega-Drain but as Golbat got closer, Ash ordered Kingler to use Hyper-Beam, hitting Golbat head-on and eliminating Mandi from the competition in the first round.