Are the anniversary event Pikachu permanent?
All Pikachu in the wild will be wearing Ash's hat. Will we be able to keep these after the event?
I know there was a similar event for Christmas, were those hats permanent?
Solution 1:
Yes, you can keep and even evolve them without losing the hats. You just can't catch any new ones after the event has ended.
The Official Twitter account confirmed you keep the hats from previous events, so it's highly unlikely to lose them this time.
Raichu evolved from #HolidayPikachu will be wearing a festive hat. Both Pokémon will also keep the hat permanently!