oh boy oh wow oh jeez oh man oh god oh shi

✨Before doing anything, disable auto save. If you don’t it will mess up the method

✨Getting mass outbreaks to spawn is very easy, you pick anywhere on the map (it doesn’t matter) and spawn there, then immediately leave for jubilife village. Knowing when a mass outbreak has spawned is also easy, upon spawning into jubilife village, there will be a Pokémon cry, this cry determines what Pokémon will have the mass outbreak, keep in mind it is possible to have more than one, but you will only hear one cry.

✨When the guard lets you know there’s a mass outbreak. SAVE BEFORE YOU LEAVE! Whether there’s going to be a shiny or not is already predetermined, saving before you leave let’s you reroll the chances for a shiny.

✨Find the outbreak and clear it, if there’s no shiny, close the game and reopen it, you will spawn in jubilife city and can go back to the outbreak with a new set of Pokémon and another chance at a shiny