Behold the peculiar treasures unearthed from the mystical realms of the Game Boy Color exclusive adventure, "Pokémon Trading Card Game 2:The Invasion Team GR!" These enigmatic promotional cards are delivered alongside the game's instruction manual, showcasing the illustrious Lugia and formidable Mewtwo. Crafted with the same flair as traditional Pokémon Trading Cards, they bear a peculiar mark, whispering the cryptic message, "This card cannot be used in official tournaments."