what is wrong with the doll in rudolph

Well, that's a bit of a complicated question. You see, the doll in Rudolph the Red-Nosed Reindeer is a bit of an anomaly. She's not exactly a character in the story, but she does have a big part to play in the plot. Her name is "Clarice" and she's a friend of Rudolph's. She's the one who helps him discover his purpose in life and ultimately saves Christmas for everyone. So, while she's not exactly a main character, she does play an important role in the story.