Have a couple ideas of pokemon to be added if there was to be an event:
1. Stantler
2. Delibird
3. Swinub
4. Possibly an implementation of Articuno??
5. An egg of which a random ice type in the game hatches.
6. A raffle for regice? Not sure if Hoenn mons have a possibility of being added atm.
7. An increased 10-15% chance and a 10% chance to encounter a chansey at the safari zone. Chansey is a good representation of Christmas spirit so it's a passable idea.