Aquapolis

Aquapolis, released in January 2003, is the 15th set of cards in the Pokémon Trading Card Game and consists of 186 cards. Its symbol is a skyline within a water droplet.

This set is the second of three to extensively use the e-Reader. Aquapolis introduces minigames playable by scanning in dot codes from multiple cards (in any order). These mini-games are usually very simple, and more often than not, each Pokémon whose card has been scanned in will play some role in the mini-game.

While Technical Machines were dabbled upon in Expedition, Aquapolis is the set to make use of them. Technical Machines would be released sparingly from this point onward.

The Aquapolis set was also the first Pokémon TCG set to utilize the "Crystal Type" Poké-power. This power was written on the Aquapolis cards Kingdra, Lugia, and Nidoking, all of which are holofoil. It essentially allows the player to attach a basic energy card to the Pokémon and have it become that type for the turn. Note that this power does not allow the player to attach an additional energy card per turn.

Of the 186 cards, the first 32 were designated with an "H" before the number. The 33rd card started at number "1." Thus, the number sequence only goes up to 147 (the 3 "Crystal Types" take the number to 150/147). In addition, there were 4 cards that received 2 versions: Golduck (50a, 50b), Drowzee (74a, 74b), Mr. Mime (95a, 95b), and Porygon (103a, 103b). These cards are identical except for the data they show when swiped through the e-Reader.