Gym Heroes was the sixth expansion of the Pokemon Trading Card game and bought "Owner's Pokemon" to the TCG for the first time ie Brocks Onix, Erika's Clefable etc. The English release of the set came on August 14th, 2000 and contained a total of 132 cards.
The set is focused on the first four gym leaders of the Kanto region; Brock, Misty, Lt. Surge and Erika - each of which have their own theme deck which was released alongside the expansion. Gym Heroes would later be followed up to a sequel-set in the form of Gym Challenge.
Titan Cards offer a wide variety of Pokemon Card Singles from the Gym Heroes set of the Pokemon TCG including common, uncommon, rare and rare holo cards.