Question: how many different kinds of pokemon cards are there?
Answer: eleven

A simplified type system was adopted from the video games for use in the trading card game. Instead of 18 types of Pokémon, only eleven exist in the TCG.  Seven were introduced in the Base Set (the first ever set of Pokémon cards); Darkness and Metal types appeared when Pokémon Gold and Silver introduced the Dark and Steel types in the video games; the Dragon type was introduced in the Japanese Dragon Selection set; and finally, the Fairy type was introduced in the Japanese XY set to correspond to its introduction in the video games.