We didn't keep very good records back then, but here's a partial list of what played that year. More to come, hopefully...
Rifftrax: The Star Wars Holiday Special
Invader Zim: The Most Horrible Xmas Ever
The Long Kiss Goodnight
Rocko's Modern Life: Rocko's Modern Christmas
Trees 2: The Root of All Evil
Bad Santa / Badder Santa
A Colbert Christmas: The Greatest Gift of All!
The Junky's Christmas
MST3K: Santa Claus Conquers the Martians
Silent Night, Deadly Night Part IV
(Part of it anyway)
Santa and the Ice Cream Bunny
Christmas on Mars