Chee-Chai Alien (ちっちゃいエイリアン Chitchai Eirian, Tiny Alien) is a video game developed by Creatures, Inc. and released on the Game Boy Color exclusively in Japan on February 27, 2001. It utilizes the Game Boy Color's infrared port and has a built-in rumble feature. It is compatible with the Game Boy Printer. Players use the infrared sensor on the Game Boy Color to find artificial light sources, to which the Game Pak responds by rumbling. The game comes with a "spectrum communicator", which enhances the sensitivity of the infrared sensor.