There is also a special kind of Pokémon in the trading card game called ""EX"" Pokémon. "EX & GX" Pokémon are stronger than regular ones, but when they are knocked out, the player's opponent draws two of their prize cards (with regular Pokémon it is just one.) Also, there is another special type of Pokémon in the trading card game called "Delta Species" Pokémon, which have types that are different than typical cards, like an Electric-type Charmander, who is usually Fire-type. In the "Diamond & Pearl" trading card game expansion, "LV.X" cards were introduced. These are a little like evolution cards, but they can only be used on Active Pokémon. In the "HeartGold & SoulSilver" expansion, The Pokémon Company released new cards, called LEGEND cards. LEGEND cards are two cards sold separately that when put together make one picture. They can be used only when the two cards they are made of are put together; they cannot work separately. 