The Aliens were the last Micronauts released in the United States by Mego before their collapse. Unlike the previous Micronauts, the Aliens did not have a Japanese Microman counterpart; these were original creations.

There is no argument as to the alignment of the Aliens - they are evil, twisted creatures from a bizarre/forbidden mingling of technology and biogenetics.

The alien vehicles are creatures within themselves, taking on the twisted forms of a hornet, an elephant, a shark, a lobster, a dinosaur (actually, two different dinosaurs), and a horse (if you can call him that).