Choromon is a Machine-type Newborn Digimon. Almost resembling a computer mouse, this tiny Digimon has a gunmetal-grey body and a tail resembling a wire. It also has two tiny red eyes and a pair of jagged antennae. The appearance of it moving around restlessly seems very cute, but because it is carrying nothing but a simple program that moves in reaction to bright lights, if its surroundings go dark it becomes completely unable to move.