He later becomes a member of the Johto Elite Four.
He is later sent to capture Articuno, which he succeeds at.
He battles Blue and restrains him, asking him to join Team Rocket. Blue refuses, and Red comes to his rescue. Koga battles them and seems to defeat them with Articuno, but it is revealed that Blue slipped his Charizard outside, and he comes crashing in to save Blue and Red and defeat Koga. Blue takes the Soul Badge from Koga's unconscious form.
Koga somehow survives and escapes the collapse of the Silph Co. headquarters.
- Janine and Roxie also train poison-type Pokémon.
- Koga is the first major Team Rocket member encountered by Red.