The Pokémon TCG Southern Islands-Rainbow Island Sky Set is a vintage sealed Japanese card set featuring cards in standard and Japanese sizes. This set includes cards of various attributes such as Fighting, Psychic, and Colorless, with characters like Onix, Mew, and Pidgeot. Manufactured in 1999 by Nintendo and Pokemon, this set is highly collectible and features promotional cards with a holographic finish. The autographed cards are authenticated by Professional Sports Authenticator (PSA), adding to the rarity and value of this limited edition set.