Robbie the Reindeer

Looking to work as Santa's navigator, Robbie arrives at the North Pole and becomes acquainted with the sleigh team, which includes Prancer, Donner, Blitzen and Vixen. Although Vixen is in a relationship with Blitzen, Robbie is soon besotted by her. Blitzen, who envies Robbie's father Rudolph, plots to have Robbie kicked off the team by discouraging him from taking his fitness training seriously, conceiving a new sleigh with inbuilt GPS navigation and proposing that the least fit reindeer is made redundant. Faking sincerity, Blitzen convinces a worried Robbie that Santa will give him preferential treatment and delay the sleigh, prompting Robbie to leave for home. Finding the journey too difficult, he is found by Santa's elves and stays with them to work menial jobs. Donner finds Robbie, informs him of Blitzen's vengeful attitude and convinces him to get back on the Sleigh Team by competing in The Reindeer Games; The two find Old Jingle, who trains Robbie with Donner and the elves' help. On the day of the games, old Jingle becomes trapped under his house; Robbie rescues him but arrives late for the steeplechase late as a result. Robbie is able to catch up with the others and winds up barely losing the race to Blitzen, who is soon disqualified and arrested when he is found to have used performance-enhancing substances. Vixen dumps Blitzen, finds that Robbie has now fallen for Donner and leaves the North Pole. Santa lets Robbie borrow the sleigh, which he uses to spend a romantic evening with Donner.

Robbie and the other reindeer now run a bankrupt holiday resort. While rescuing a tourist, Robbie falls of a cliff and is rescued by a Viking, who then disappears. Later, Blitzen is released from prison early due to good behaviour, which he uses to trick the other reindeer into building a trap for themselves. Robbie, Donner and Prancer are the only ones to escape, and seek the aid of the last remaining Viking tribe (whose diminutive members are all named "Magnus"). Robbie's methods of searching for the tribe strain his relationship with Donner, who dumps him in frustration shortly before she and Prancer are recaptured by Blitzen's rabbit sidekick Long Eared Jack. Using special remote-controlled hats to turn them into "robots", Blitzen uses the former sleigh team as attractions in his park Blitzen's Reindeer World. Robbie finds the tribe, who have been hiding since they avoided a battle that finished off every other Viking. Robbie brings them out of their shame, but is kidnapped mid-speech. The Vikings rescue Robbie and assist him in saving his friends. Blitzen engages a hand to hand fight against Robbie which is interrupted by Donner talking to Robbie about their relationship. Blitzen convinces Robbie to propose to Donner and attempts to kill him before he can hear her answer; Donner accepts Robbie's proposal and finishes off Blitzen in a move that throws him directly into jail. Meanwhile, Prancer overpowers Long Eared Jack and discovers that he was the international criminal Carlos the Hamster in a mechanical disguise; Carlos is also jailed. To salvage their business, the reindeer partner with the Vikings to create a themed disco.

On the night before his wedding to Donner, Robbie picks up an alien crystal that falls from the sky. During the wedding, a voice telepathically warns him of the end of the world and he runs out mid-ceremony in panic. Robbie finds that the voice belongs to Gariiiiiii, an Earth Guardian, who warns him that an alien race named the Nargathrons plan on destroying earth and that Robbie's crystal powers their ultimate weapon. Moments before dying, Gariiiiiii tells Robbie to hide the Nargathron crystal and leaves his telepathy device. At the Sleigh Team's home, Nargathron queen Vorkana arrives and kidnaps Donner when she refuses to give Robbie's location. Prancer, Old Jingle and Tapir find Robbie, and the four of them discover Gariiiiiii's spaceship. Robbie flies to the Nargathron ship, where he is imprisoned alongside Donner. The others take the crystal back to their home, where Donner's sister Em reveals that she is a government agent who specialises in extraterrestrial life. She is able to contact the Earth Guardians using the crystal but is soon found by the Nargathrons. With the crystal, the Nargathrons count down to their destruction of Earth. Robbie uses the telepathy device to trick the guards into freeing Donner and himself, then uses the ship to teleport Donner back to earth. Robbie tricks Vorkana into standing on the ship's teleport pad and sends her to Em, who knocks her out. Robbie escapes the ship just moments before it is destroyed by the Earth Guardians, and uses the telepathy device to complete his wedding ceremony.