Between the Known and Unknown, There Are Unseen Forces!
Uncover powerful new forces in the Pokémon world: Lugia, Ho-Oh... and you! In EX Unseen Forces, you'll be the first to find and capture rarely seen legends. Take them into battle to reveal your own unseen powers, and unveil greater worlds and greater battles than you ever knew existed.
EX Unseen Forces is the name given to the tenth main expansion of the EX Series of the Pokémon Trading Card Game. In Japan, it was released as Golden Sky, Silvery Ocean, the fourth expansion in the Pokémon Card Game PCG Era. It is based on Pokémon Gold and Silver, and Pokémon Crystal, featuring generation I and generation II Pokémon. The English expansion was released on August 22, 2005, while the Japanese expansion was released on April 8, 2005.
The Reverse Holofoil in this expansion featured 3D Poké Ball pattern.
The Golden Sky, Silvery Ocean set is only released in Japanese, in both 1st and unlimited edition. The EX Unseen Forces set is released in English, German, French, Italian, Spanish, and Portuguese with cards also available as Reverse Holofoils. The non-holo Uncommons in the Japanese set are available with two different codes at the bottom-left; the non-holo Commons in the Japanese set are available with four different codes at the bottom-left; and the non-Holo Commons in the English, German, French, Italian, Spanish, and Portuguese sets have three different codes available. The purpose of these different codes is still unknown, but occurred throughout the first half of the EX era.