"I Want a Dog for Christmas, Charlie Brown!" centers on Rerun, Linus and Lucy's lovable but ever-skeptical younger brother. It's Christmas vacation, and as usual, Rerun's big sister is stressing him out, so he decides to turn to his best friend, Snoopy, for amusement and holiday cheer. However his faithful but unpredictable beagle companion has plans of his own, giving Rerun reason to ask Snoopy to invite his canine brother Spike for a visit. When Spike shows up, it looks like Rerun will have a dog for Christmas after all - but then the real trouble begins.
Walking along with his bulldog, Charlie finds a "good luck" horseshoe just as he passes a training camp advertising for a boxing partner "who can take a beating." After watching others lose, Charlie puts the horseshoe in his glove and wins. The trainer prepares Charlie to fight the world champion. A gambler wants Charlie to throw the fight. He and the trainer's daughter fall in...
A dog gains superpowers after his is abducted by aliens. Together they battle an evil cat threatening humanity while the dog becomes a famous superhero.