|Right Arm:||Mute Hand|
|Left Arm:||Mute Arm|
|Medarot 1, Medarot 2, Medarot Navi, Medarot 2 CORE, Medarot 1 (manga), Medarot Card Game, Medarot OCG|
Cosmo-Alien resembles a classic gray alien with large red eyes. Unlike other Medarots, it has no mechanical-looking parts, and instead has a body made of nanomachines that allow it to change shape. It has a set of red symbols written on its forehead and chest, which are replaced with red triangles in its Navi design. In battle, Cosmo-Alien can transform its head and arms into random Medarot parts, giving it a highly unpredictable fighting style.
In the world of Medarot, Cosmo-Aliens are implied to be "real" aliens, that come to Earth on spaceships and live seperately from humans and other Medarots.