Santa Claus was constructed in 2117. Built to rigorous Yuletide specifications, he was to distribute gifts to all of Earth's nice on X-Mass Eve. Unfortunately his threshold of nice is so high that everyone but Doctor Zoidberg comes out naughty.
In the face of this naughtiness, Santa emerges from his Neptunian Ice Fortress every X-Mass Eve to engage in a brutal Earthwide rampage. Santa's feels that the terror he inflicts brings out the old fashioned X-Mass spirit.
In times of dire need Santa might call on another robot - as he did Bender - to help him complete his appointed rounds.