A handheld electronic game (as opposed to a handheld video game), made by Hasbro. The idea is like that of Pokemon: You train a creature to battle other creatures.
Unlike Pokemon, there are only 3 species: Cycro(green), Spino (red), and Plasmo (blue). Each of these species has modular parts with which they are built: a head, body, and tail. Also unlike Pokemon, battle occurs secretly. Each unit communicates with other units with RF signals (range: about 30 feet), and when challenged to fight, you may not know who the challenger is.
If you are defeated, your opponent may take one of your parts, but do not fret: each time a part is taken, it gains strength. You may take your art back some day, and it will be stronger.