Pocket Monsters In-Case Collection (ポケットモンスターケース入りコレクション) are unique figures inside tiny plastic cases. The bases of each case can lock together horizontally, and even vertically, creating a nice display. While Pokémon aren't too difficult to find, the Pokémon can be exceptionally rare and seldom seen. It is not known how many Generation II Pokémon have been made. While earlier sets feature only the figure and case, later sets include a dynamic paper backdrop. Base color also can come in red, green, or blue.