>>27455402>Basically when a Legendary event is going to happen (most of the time) there will either be an official announcement or messege when you boot up the game (it really depends on the pokemon. The first legendaries to have an event will definitely have an official announcement).This is about as much truth as there is.
>The events will be available in multiple major cities/landmarks at a time. For example, the first legendary, mew, is going to be available at both Time Square and the Eiffel Tower at the same time among other places. Each legendary will have different landmarks, but Niantic wants to make sure that everybody has at least the opportunity to catch the legendary. Nobody would be happy if Mew was ONLY at the Eiffel Tower. Basically from that point, the catching is going to work surprisingly accurately to how the trailer showed. People are going to all be throwing pokeballs to try and catch the Legendary. As more pokeballs are thrown, the higher chance of capture the pokemon will have. There's already a promo event going on that increases the chance of a legendary popping up. With the method being that you post a link and everyone clicks it to gain "Legendary Stardust." for a device.
Masterballs are one of the three items that get unlocked because of this event.
Take it how you will.