From Bulbapedia, the community-driven Pokémon encyclopedia.
Laboratory (Japanese: ポケモンラボ Pokémon Lab) is one of the five sets found in Template:Card GB for the Game Boy Color.
The booster pack image features a Mewtwo.
Club Masters and their Club Members usually give out these booster packs when they are defeated. Some of Dr. Mason's mail also have these booster packs as an attachment.
Laboratory includes cards from Base Set, the Jungle expansion, and Fossil expansion. Ninetales, Magnemite, Electrode, Pidgeot, and Ditto are included as in-game exclusive cards.