From Bulbapedia, the community-driven Pokémon encyclopedia.
Ichikawa (Japanese: イチカワ Ichikawa), also known as GR-3, is a member of Team Great Rocket from Pokémon Card GB2: Here Comes Team GR!.
He has disguised himself behind a mask with a mark across it. In Pokémon Card GB 2, he has trapped the original members of the Water Club and Fire Club in small cages, and must be challenged in a 6-prize duel in order to free the Water Club crew. His GR-3 Deck focuses on and Pokémon.
When defeated for the first time, the player is given one of both We Are Team Rocket and Island of Fossil booster packs. After being defeated at the Water Club, he moves to the Fire Club, where he may be challenged again in a 6-prize duel. When defeated there, he gives the two booster packs once again as well as one piece of the Team Great Rocket coin, and frees the Fire Club members.
He appears again in the second room of the GR Lightning Fort. When the player meets him there for the first time, he reveals his identity. He can then be challenged to a duel, but only if the player's deck has only Energy cards. He uses the This is the Power of Electricity Deck (Japanese: でんきのチカラだデッキ), and when defeated, he hands out one We Are Team Rocket booster pack. He also releases the imprisoned Grand Master Steve and opens the door to the next room, so the player can reach Catherine, the Fort Master of the GB Lightning Fort.
This is the Power of Electricity Deck