The Pokémon games involve making decisions about what to do and when to do it. They allow the player to catch the monsters, train them to make them better and attack other monsters so that they get better abilities and possibly evolve into different Pokémon. It is also possible to trade Pokémon with a friend. The Pokémon in the battles never bleed or die; they only faint. All Pokémon love human beings, except for Shadow Pokémon - the doors to their hearts have been artificially closed. The game's slogan in the U.S. was "Gotta catch 'em all!", although now it is not used officially any more. The Japanese slogan is "Let's get Pokémon" Over one hundred million (100,000,000) of the games have been sold so far, not counting the ones released for the Nintendo 64 and the Nintendo GameCube. This makes it the second best-selling video game series of all time (after Nintendo's Mario series).