With the release of PokÃ©mon X and PokÃ©mon Y, there are now a total of 718 pocket monsters to choose from. Each one can learn dozens of different attacks, and their strengths and weaknesses can vary greatly. The relationships between different PokÃ©mon types â what's weak to what, in other words â is one of the most important elements of the PokÃ©mon battle. Yet with 18 types (thanks to X and Y's new fairy type), it can also be one of the most difficult aspects to master.