Pokemon Skyridge is the result of the convergence of two Japanese e-Card sets, e-Card 4 and e-Card 5. The official names are Split Earth and Mysterious Mountains. Although two additional sets had originally been planned, Skyridge was the last Pokemon TCG set produced by Wizards of the Coast. There are 182 cards in the English version of the game. Many characteristics of past Pokemon sets were used for the final time in Skyridge, including Crystal Pokemon, the separate holographic numbering system used in Aquapolis and playable e-Reader applications on the cards. Kadabra also made a final appearance in Skyridge, despite Abra and Alakazam continuing to make make future apperances.