The fact that certain Pokémon cards are only occasionally available is one factor contributing to their rarity. These have brought new characters and gameplay elements. To keep the game interesting and new, numerous series and expansions have been produced over the years. In 1996, the Pokémon Trading Card Game was first released in Japan, where it spread fast to other countries. Each card includes a particular Pokémon character as well as details on the character's stats, skills, and other game-related information. The popular Japanese franchise of video games, anime, and other media depicting imaginary animals named 'Pokémon' is the inspiration for Pokémon cards, a form of collectible trading card game.