This catagory lists any alien lifeform that has the evolutionary ability to assume the forms of any object, other living things, or to gain a more fearsome appearence like Changelings from the Dragonball series and Deoxys from the Pokemon series, most shapeshifters often use the ability to hide from their enemies not confronting them although some do confront their enemies in any form they please.

This includes shapeshifters that have to absorb or consume genetic material in order to change.

The Thing

Anunnaki

Sil's Species

Boglodite

White Martian

Green Martian

Frieza's Species

Ctarl-Ctarl