To quote the Alamo Draft House:
A bizzaro 1959 gem of a foreign film created by Mexican director Rene Cardona simply called Santa Claus. Cardona, who normally made lucha libre (Mexican wrestling) themed films, demonstrates in this odd creation that he was slightly familiar with American Christmas tales about Santa Claus.
In this unintentionally amazing holiday movie, Santa lives in space, is buddies with Merlin the Wizard, controls a team of terrifying robot reindeer... and is maybe an alien? Throw in a mischievous Satan in balloon shorts trying to steal all the Christmas joy from the world and you've got a trippy new spin on about nine classic tales.