Christmas is usually celebrated alongside this Saint who actually has his own holiday on December 6th, to celebrate the anniversary of his death in 343 AD.
St. Nicholas
The National Weather Service defines this as a severe snow storm characterized by strong winds and in Pokemon it is a 5 PP Ice Type move.
Blizzard
"All I Want For Christmas Is You"
Mariah Carey
There are actually two North Poles, true North Pole and this North Pole.
Magnetic
This team was crowned Stanley Cup champion at the end of September, which is the closest to winter a Stanley Cup champion has been crowned in recent memory.
Tampa Bay Lightning
This holiday is always celebrated on the shortest day of the year, which this year lands on December 21st.
Winter Solstice.
The National Weather Service defines this phenomena as a form of precipitation consisting of solid ice and in Pokemon it is both a move and weather effect where for the next 5 turns non-Ice type Pokemon will take damage.
Hail
"Santa Tell Me"
Ariana Grande
During the holiday months, many places will add sodium chloride to their roads to prevent icing along with salts of chlorine and either of these two alkaline earth metals.
Calcium or Magnesium
This snowboard event is arguably the most famous as the U shaped long chute offers snowboarders the opportunity to show off some of the most iconic tricks.
Half-Pipe
Hanukkah is celebrated every year for 8 days during the winter months, during which this celebratory object holds candles that are burned to celebrate the ancient miracle.
Menorah
Known as the Weather Pokemon, this Gen 3 Pokemon is found in the Pokemon equivalent of the National Weather Service (the Weather Institute). It would be in its Snowy Form this time of year.
Castform
"It's Beginning to Look a Lot Like Christmas"
Bing Crosby
Christmas Island is the home of Gecarcoidea natalis, a this type of animal, whose mass migration to the sea to lay their eggs turns the island into a moving mass of red.
Crab
Amongst most commercial ski and board-able mountains, runs with this indication are the hardest and most dangerous
Double Black Diamond
Kwanzaa is based on ancient African harvest festivals and translates as First "This", which calls back to its nature as a harvest festival celebration.
Fruits
This Gen 2 Pokemon is basically a penguin Santa in the Pokemon universe, as it is known as the Delivery Pokemon and has a signature move called Present
Delibird
"A Holly Jolly Christmas"
Burl Ives
If Santa was to circumnavigate the globe in one night, he should have a good understanding of this kind of geometry to get around our massive globe.
Non-Euclidian
Cool Runnings introduced most of the world to the bobsled competition, these two other events take place on similar tracks at the Winter Olympics.
Luge and Skeleton
Diwali, the festival of lights, was celebrated towards the end of November this year and was celebrated around the world by these three religious groups.
Hindus, Jains, and Sikhs.
Quite literally looking like a snow flake, this Gen V Ice Crystal Pokemon would perhaps be the most fitting Winter Pokemon if it ever snowed in San Antonio.
Cryogonal
"The Christmas Song"
Nat King Cole
Snowflakes can be expressed as this kind of geometric figure that have expanding symmetry.
Fractals
This move is the hardest figure skating move to pull off at present time, with few professional skaters able to pull off the jump with regular consistency.
Quadruple jump