Jack Frost is the main antagonist of The Santa Clause 3: The Escape Clause.
He is portrayed by Martin Short.
The Santa Clause 3: The Escape Clause
Though he is a member of the Council of Legendary Figures, Jack Frost was extremely jealous of the current Santa Claus (Scott Calvin) because of his popularity with little children and even desired his own holiday called "Frostmas" (even he also obnoxiously conducted ridiculous ideas of his own other holidays, "Frostgiving", the "Frost of July" and "Frosthog Day".). The Council have taken disciplinary action against Frost and charged him with 273 counts of crime against the Legendary Figures ethical code of conduct including attempted upstaging of Santa Claus, freezing of a volcano in Hawaii and snowing in the Amazon, and frosting of all Mexico which sends all of the geese north for the winter (with 270 cutout figures of himself wearing his Frostmas sash found in every shopping mall all over the Northwest as evidence).
And so after causing trouble in the North Pole, he finally stole his magic snow globe, tricked him to active the classified Escape Clause by saying "I wish I have never been Santa at all", and went 12 years back in time to the year 1994 where Santa accidentally killed the original Kris Kringle. Frost put on the coat, took over the North Pole, and turned it into a Frostmas-themed amusement park named "North Pole Resort".
After Scott Calvin undo the wrongful changes and returned the North Pole back to normal, Jack Frost, who quickly arrested by the North Pole's Elfficers for freezing both Dr. Neil Miller and Charlie Calvin's mother Laura, later reverted to good when a warm hug from Scott Calvin's niece Lucy transformed him, unfroze her parents, and made him want even more hugs.