All characters of the show who are creatures or other living beings that come from anywhere outside of Earth.
Note: Beings from other dimensions do not count as aliens. Characters in this category must come from a different planet or place in outer space, but still exist in the Dimension C-137 with the exception of the Replacement Dimension from Rick Potion #9.
This category has the following 2 subcategories, out of 2 total.
Pages in category "Aliens"
The following 177 pages are in this category, out of 177 total.