Pokémon Christmas is much more than a simple graphics hack to add snow. This game takes place the same year as GSC, just later in the year. It assumes that the events of GSC (the radio tower take over, magikarp being forced to evolve, and all that) took place that summer, so the major events will be different, and more winter or holiday themed.

Features:

- Choice between boy and girl
- Major events changed to new and/or holiday themed ones
- New tiles
- Map updates
- Physical/Special Split
- New Pokémon, moves and items
- Ice sliding on frozen lakes
- New locations, including: South Isle, Battle Tower, Ecruteak Shinto Shrine, Dragon Shrine, and more
- Trainers sprites and rosters updated