From Bulbapedia, the community-driven Pokémon encyclopedia.
Game art of King Biruritchi
King Biruritchi (Japanese: キング・ビルリッチ King Biruritchi) is the creator of Team Great Rocket from Pokémon Card GB2: Here Comes Team GR!. A large and intimidating man, he and his minions kidnapped the Grand Masters and Club Masters and stole the four Legendary Pokémon cards for use in their schemes. Biruritchi resides in Team GR Castle on a far-away island. If defeated in a best-two-out-of-three card duel, he admits defeat and gives up the Togepi Coin and the GR's Mewtwo card.