The Last Poster Wins! [v22]

[Bulbasaur]

Free, it's just a rare chance getting it. Niantic hands them out at certain points to random players. If you've been to a gym that holds this event at times your chances are higher. Not garunteed, but higher. Still pretty rare

Ah. Well I probably won't get one. XD

[Chakramaster]

Ah. Well I probably won't get one. XD

Thing about these too is you are given a ticket with it telling you "you've been invited" and it gives you a location nearby and a time when it will spawn.
@Pokemon Trainer Sarah oh I've got a lot of rare candies too. It's the Stardust I lack xD