With Pokemon Sun and Moon just being released, it seems that Game Freak has finally released the game’s first ever Global Event. And the rewards are really something to look forward to.
According to the official release in the Pokemon Global Link:
If everyone combines their efforts to catch 100 million Pokémon between November 29 and December 13, 2016, each participant will receive 1,000 Festival Coins as a reward. If the goal isn’t met, Trainers who contributed will still receive a participation prize of 100 Festival Coins. To be sure that your Pokémon bounty gets included in the final count, be sure to use Game Sync by December 13.
So just head out and click on the Festival Plaza, talk to the NPC beside the computer inside the Festival Plaza castle and join in on the fun.