|First Appearance||The Most Horrible X-Mas Ever|
The Santa Suit is an elaborate disguise that Zim created to make himself look like Santa Claus. The suit eventually gains sentience, believes itself to be the real Santa Claus, and overtakes Zim. It first appeared, and served as the main antagonist, in "The Most Horrible X-Mas Ever".
The Santa Suit is a robot suit created by Zim in the hopes of controlling Earth's population. His plan was to use the suit to impersonate Santa, and send the humans off into slavery for the Irken Empire by taking advantage of their trust toward the beloved holiday figure.
The Santa suit is an advanced piece of technology made from a Vortian liquid substance. Every molecule is a tiny hard drive filled with Santa data. A brain interface strip connects to the user's head and allows them to control the suit. However, this advanced technology allowed the Santa suit to gain sentience, and eventually it believes it is the real Santa. Seeing anything holiday-related causes it override the brain interface, and act jolly as the real Santa would. Zim eventually loses control of the suit, and it absorbs Zim completely and transforms into a hideous Santa monster. Later, Dib frees Zim and launches the suit into space.
The Santa suit regains its energy in space, and orbits Earth once a year (every Christmas). Two million years after the events of the series, the people of Earth still experience his annual visit to destroy their cities, and require huge protective domes to keep him out, even luring him away with giant milk and cookies.