I know that Nancy is still alive in the SuperMarioLogan series but she died in Puppet Pals. So, yeah, Nancy died in a Puppet Pals video called The Vicious Dinosaur returns to town by Black Yoshi killing her. So, that was the reason why she was added to the deceased villains category.
He caused a football to make Charlie Brown fall, he did an evil laugh and he wanted to take over Radiator Springs, that's why I consider him a villain. Plus, I don't think he does any heroic acts. Even though the video mainly focuses on him since he's the main character, he doesn't really peform heroic acts. Therefore, I don't think he is a hero or a protagonist. I mean, is he really a protagonist? Is he always a villain or he is an on & off villain? In my opinion, he's more of a villain then a protagonist.