|"Aliens (D.W.'s Snow Mystery)" is not an official name.
are a species of alien
. They are one of the few aliens that are not imaginary.
They were the ones who stole the snowball in "D.W.'s Snow Mystery," although Brainy Aliens were credited in "Return of the Snowball."
In "The Chips are Down," they show up at the end of the episode to tell the audience that they were ballet fans.
Buster imagines that they accidentally hit Francine in the head with a soccer ball in "Muffy's New Best Friend."
Postcards from Buster