Super Mario Bros. 2: Christmas Edition is a ROM hack of Super Mario Bros. 2.
The ROM hack is pretty much the same as the original game. All 20 levels are the same, but the graphics have been altered to fit with the Christmas-themed holiday. Mario, Luigi, Toad, and Princess Toadstool are given new looks. Birdo is taken out and replaced by Frosty the Snowman, while Shy Guys and king Wart wear Santa hats. Most of the stages and their scenes have snow constantly falling. Pegs have been replaced by presents, tree ornaments, Santa hats, and ball ornaments.