Koga is a character appearing in the anime series, who is the Gym Leader of Fuchsia City in the Kanto region.
Koga's appearance is based on his game counterpart who had blue green short spiked hair and black eyes. In the anime, his hair is shown to be black but in flashbacks in the BW series it was reverted back to his natural hair color.
His primary appearance is a blue long sleeve ninja suit with a black mesh shirt underneath and black boots.
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Season 1: Indigo League
After Ash battled Aya, her brother, Koga, arrived. He stated nobody could left until the battle was over. Ash sent out his Bulbasaur against Koga's Venonat, who evolved. Venomoth launched Stun Spore and Sleep Powder, affecting Ash's Bulbasaur. Ash sent out Charmander, who launched Flamethrower, canceling Venomoth's Stun Spore. Just then, Team Rocket arrived and stirred trouble, by throwing some sticky substance, which binded everyone to the floor. As Misty wanted to sent out Starmie, Psyduck came out and Arbok bit on its head. Instead, Koga used Voltorb to make the group escape out of the Gym. However, Team Rocket tracked them down, where Psyduck's psychic powers triggered and blew them away. Koga was impressed and proposed a trade, but Misty refused. Outside, Koga and Ash had their battle, uninterrupted. The two have a one-on-one battle, with Ash using his Charmander, and Koga using his Golbat. Initially having some trouble, Charmander was unable to hit the Golbat, but after using Fire Spin, Ash was the winner. Upon leaving, Koga rewarded Ash with the Soul Badge.
Season 16: BW Adventures in Unova and Beyond
Koga appeared in Ash's memory when Ash remembered Charizard's past and its battles.
|Koga's Venonat evolved into Venomoth before his first battle with Ash began. It easily defeated Ash's Pidgeotto. After the battle, he offered it for Misty's Psyduck, but she rejected the trade.|
|Venonat → Venomoth|
|Koga used his Golbat during the second round of Ash's Gym Battle. It lost to Ash's Charmander, thus earning Ash the Soul Badge.|
|These Pokémon were used for making quick escapes like smoke bombs.|
- English: Stan Hart
- Japanese: Hōchū Ōtsuka
- Polish: Radosław Popłonikowski
- Spanish: Juan Fernandez
- Iberian Spanish: Gerardo Vasquez