Online Journeyman Trophy in 3D Ultra MiniGolf Adventures 2
Host 3 online games.
How to unlock Online Journeyman
These do not need to be tournaments, but they will need to be done with another person online. If you make a custom game with one hole and simply start the game, that counts as 1. You don't have to finish the hole for it to count, as long as you're hosting, you will get credit for a game. Just do this three times to unlock the trophy.