My vote goes to Olive the Other Reindeer. It's a really clever special, and I like the character designs, especially Olive's. It didn't make much of a ratings splash when it first aired, but I loved it immediately. My only criticism:
SPOILER
...involves the scene where Olive asks one of Santa's reindeer "Where's Rudolph?" and the reindeer answers "There is no Rudolph. He's just an urban legend." Now that's a good line, but...I dunno. It's a bit jarring for a kids' special. And given the fact that the show's premise is based on the song "Rudolph the Rednosed Reindeer", it seems a bit...ungracious. But that's a silly nitpick, I know, and the show is charming nonetheless. And Drew Barrymore does a great job as Olive the dog. She even barks convincingly! :anime: