If you’re in Europe, you’ll be able to catch Latias and Latios from September 1 - 23 in Pokemon (Ultra) Sun and (Ultra) Moon simply by accessing the Mystery Gift option on the main menu (you’ll need to be connected to the internet to receive the gift). Those in the US have from September 2 - 29 to head to a Best Buy store and get a free code that they can redeem via Mystery Gift.
Pokemon Sun and Ultra Sun players will be getting Latias, while people who own Pokemon Moon or Ultra Moon can catch a Latios. Your Pokemon’s level and moveset varies based on whether or not you have the standard or Ultra version of the game. You can find the full breakdown over on the game’s official site.While you’re waiting for Latias and Latios to descend on Pokemon Sun and Moon, you might want to check out the Pokemon World Championships happening in Nashville this weekend. The festivities start tomorrow, and you can find all the details here.