The set predates the official Pokmon Trading Card Game (TCG) and is considered one of the earliest examples of Pokmon cards produced for the public
Instant Copy (CTRL to add secondary) Creature Anowon, the Ruin Thief Other Rogues you control get +1/+1
card game, or an adaptation of the anime, Falsebound Kingdom instead opts to be a turn-based RPG/strategy game hybrid
Id recommend getting matte ones if youre a frequent Pokmon TCG player, while those who prefer collecting should get the glossy sleeves
Hydras ended up being the perfect match for their feral nature, connection to the wilds, and their embodiment of growth through a growing number of heads
And then there are some real misfits, that are almost impossible to identify if you dont know the origin of the item