Mine was on Fat Tuesday this year. It always lands on the day before Valentine’s Day (and the day after the America-exclusive holiday of Abraham Lincoln’s birthday).
I got it, just for you. It’s actually a popular collectible that you cannot get anymore. Most of the users who own it are currently inactive. This collectible is as rare as the regular Pokéball collectible.
I finished collecting all badges and beat the Elite Four. What I’m still waiting to do is finishing my Pokédex. Oddly enough, the legendaries (including Mew) were easy to get. What I can’t get is Oddish, Sandshrew, or the Pikachu exclusive ones.