Koga is a character appearing in Pokémon Adventures, who is a member of the Elite Four in the Johto region, was the Gym Leader of Fuchsia City and was an executive of Team Rocket in the Kanto region.
Koga is identical in physical appearance to his game counterpart. His clothing varies throughout the series' medium, in which his first appearance depicted him wearing a bandanna like cloth, except for when he becomes a member of the Johto Elite Four in the HG/SS arc, with his clothing resembling that of his game counterpart's.
Koga's personality is first depicted to be cruel and merciless, as shown during his battle against Blue and Red in Pokémon Tower, as he uses Articuno to nearly freeze the pair to death. However, after their conflict, Koga returns once more to face off against the Elite Four member Agatha, teaming up with his nemesis, Blue to defeat her, and displays more admirable characteristics such as bravery and concern for others.
Giovanni placed Lt. Surge, Sabrina and Koga as his three subordinates, who trained the grunts, while Giovanni was inspiring them with speeches. Despite serving Giovanni, Koga didn't have much time to train himself.
Red, Green & Blue arc
Koga first appears at Mt. Moon, where he is fervently searching for the Moon Stones to bring back to Team Rocket. He is stopped by an untimely appearance by Red and Misty, who thwart his operation. Koga then makes an appearance at the Pokémon Tower in Lavender Town, planning to use his Gastly to revive the deceased Pokémon corpses stored there. However, Red and Blue form an unlikely alliance against him, but experience difficulty in the battle, primarily due to his Arbok's ability to regenerate and control separated body parts. After this, Koga brings Articuno to Saffron City under Giovanni's orders, who then proceeds to combine the three legendary birds together into an amalgamation of the three. As Red and Blue oppose his plans at Silph Co., he nearly kills them by using Articuno to freeze them to death. However, Blue manages to defeat him by using his Charizard's flames to melt Articuno's ice.
Lt. Surge, Sabrina and Koga "welcomed" Blue and Blaine to Cerise Island. Sabrina promised to tell what happened to her, Sabrina and Lt. Surge, but new "guests" were coming: Yellow, Green and Bill. The Team Rocket executives explained after Silph Co.'s destruction, the trio went into hiding. Since the Elite Four were destroying the lands they wanted to conquer, the trio proposed a temporary alliance. Since they needed more power to defeat the Elite Four, Yellow, Blaine, Green, Bill and Blue accepted. Sabrina gave all of them Spoons of Destiny, to team up two people to fight the Elite Four. Koga was paired with Blue. With everyone ready, Koga went with Blue deeper into the caves. Before they continued on, Blue returned Koga his Golbat back.
As Blue and Koga wandered into the caves, Koga's Golbat used Supersonic to trace their enemy. Koga noticed a figure and threw his shuriken, but the figure moved away and sent Arbok. Blue noted their enemy was Agatha. Agatha's Arbok leered them, so Koga's Golbat used Haze to nullify the effects. Agatha taunted them that they were too young to stop her, as her Arbok used Rock Slide, making stalactites fall down. Blue rescued Koga's Golbat but dropped some medicine. In addition, he got paralyzed by Agatha's Gengar's Lick. While Blue was facing Agatha's Golbat, Koga battled against Agatha, who claimed a Gym Leader was no match for a member of the Elite Four. Agatha had her Arbok change the pattern on its body, which increased its speed. With a snap of the finger, Agatha had Arbok wrap Koga and change its patten, dealing even more damage to him and his Arbok. Still, Koga had an idea how to defeat Agatha's Arbok.
Koga had his Arbok use Glare, but Agatha's Arbok resisted the effects, then used Body Slam to inflict damage to Koga and Arbok. Agatha had her Arbok bite off Koga's Arbok's tail away. Koga sent Muk to use Poison Gas and Weezing to emit Smog. However, Arbok changed its pattern, resisting the attacks, then defeated Muk and Weezing. Since Blue was still paralyzed, Koga threw a multitude of Shuriken Poké Balls randomly. Agatha mocked Koga's predicament, believing that he was out of ideas. Blue returned with Koga's Golbat, as one of the Poké Balls, in which Koga's Ekans was in, contained Parlyz Heal to cure Blue. Her Arbok's crest pattern was subsequently obscured by Koga's Golbat, whom he told to drink his blood using Leech Life. Unable to see her Arbok's pattern, Agatha had Arbok bind Koga. However, she and her Arbok were defeated by Blue's Golduck's Confusion. With Agatha out of the way, Blue and Koga proceeded to move on further into Cerise Island. Her Arbok tried to use Poison Sting, but Koga evaded its attack. While Blue and Koga were going through the maze, Agatha had her Gengar hide in their shadows.
Blue carried Koga, who claimed they were walking in circles. They found his Arbok's discarded tail, and even noticed Agatha was gone. Koga also started to feel weaker than usual. Blue warned him not to strain himself, but Koga felt it wasn't just because of loss of blood. They turned around and saw Gengar was draining their energy, and was hiding in their shadows. Koga was lying down, as Blue dealt with Gengar. Koga had his Koffing emit smoke to signalize to Blue when Gengar would appear. Blue managed to defeat Gengar with help from his Arbok's severed tail. Koga was pleased by Blue's improvement in his skills, and would note them the next time he would face him. The shadows around Agatha's battleground were diminished by Golbat's Confuse Ray. Koga read the message in the sky, sent by Starmie, that the forces of the Elite Four were trying to obtain badges to extract the energy for their plans. Agatha, however, waved her cane, causing spikes to fall on Koga, who protected himself with his Muk and vanished.
Fortunately, Bruno saved Koga from Cerise Island. The two saw they were former criminals and started training with each other, improving each other's skills. Koga's whereabouts were not known after the battle ended.
Gold & Silver arc
Koga left his Gym, which was empty and without a leader. The Association spoke of the problem, seeing they had to be careful about which candidate should be for his Gym.
During the Gym Leaders' tournament, Janine retreated and tried to search for her father, convinced he was watching her battle.
Lt. Surge faced his former subordinates, Ken, Harry and Al. Since they did not respond, Lt. Surge made them remember how they served Giovanni, alongside Koga and Sabrina, too.
Bruno and Koga faced Red and Blue, their former enemies. Red and Blue mistook they were to fight them and sent Espeon and Rhydon to battle their Tentacruel and Tyrogue. However, Bruno had his Tyrogue smash a rock, as they both exclaimed they were here to help them. Both of them helped dig through the caverns. Bruno also explained he felt that the reason for all the chaos was the time-traveling Pokémon, Celebi, which was seen at Ilex Forest.
HeartGold & SoulSilver arc
- ^ YL016: The Coming of Slowpoke (Eventually)
- ^ a b CR052: The Last Battle II
- ^ a b c CR060: The Last Battle X
- ^ CR020: Crossing Crobat
- ^ YL025: Karate Machop
- ^ YL026: Punching Poliwrath
- ^ YL029: Playing Horsea
- ^ YL030: Allied by Alakazam!
- ^ YL031: Muk Raking
- ^ YL032: Weezing Winks Out
- ^ YL036: Take a Chance on Chansey
- ^ YL037: Striking Golduck
- ^ a b YL045: Gimme Shellder
- ^ GS009: Sunkern Treasure
- ^ CR040: Notorious Noctowl
- ^ CR059: The Last Battle IX
- ^ CR064: The Last Battle XIV