The 5th Global Mission for Pokémon Ultra Sun and Ultra Moon called Trade Pokémon at the GTS! takes place from March 6th, 2018 until March 19th, 2018 and all Trainers must collectively collectively trade 1,000,000 Pokémon to receive 2,000 Festival Coins as a reward.

Make Tons of Trades for the Next Global Mission

Head to Festival Plaza in Pokémon Ultra Sun and Pokémon Ultra Moon and trade as many Pokémon as possible using the GTS feature for the “Trade Pokémon at the GTS!” global mission, now in progress. The goal is for all Trainers to collectively trade 1,000,000 Pokémon by 23:59 UTC on March 19, 2018. If the goal is reached, every participant will receive 2,000 Festival Coins as a reward. Even if the goal isn’t reached, everyone will get a participation prize of 1,000 Festival Coins. Trainers who have registered their game at the Pokémon Global Link by the end of the global mission will receive double the number of Festival Coins—4,000 when the goal is reached, and 2,000 even if it isn’t. Be sure to sign up today.

Source: https://3ds.pokemon-gl.com/information/cc6718cf-c907-4c13-96b8-34013480c657