Today, as I was walking to my car, I opened up Pokémon Go to catch as much as I could during my walk. However, I noticed something strange in my Nearby/Sightings tab, so I expanded it:
"Huh, cool, they gave Pikachu a Christmas portrait for the holidays," I thought, as I minimized the tab and went to go catch it. However, when the encounter started, I noticed Pikachu was actually wearing a Santa hat.
After catching Pikachu, I checked to see if my other Pikachu also had been given hats, but, to my surprise, they had not.
What does the Santa hat do for my Pikachu? Is it going to disappear or do I now have a special Pikachu?