An idea for the Tapu legends side event could be after the MC collects all the Tapu they would let him join them for their long overdue Luau (something kept them from going). The Tapu could have a day where they all secretly come together on a small island that they only know about and no other pokemon inhabit it. Being the guardian of each island is stressful while battling any ultra beasts that appear and having babysat many Cosmog that Solgaleo/Lunala left to grow. So they made a event for themselves to cut lose for a day and not care about how they act. The thing they will most look forward to is a stuffing contest with each other to see who can get the biggest belly and felling so full. The MC can then judge who won and gets the MC's white cream for desert. Once they realize they can have big full belly's all the time when they choose to follow the MC and see the island will be just fine without them for a couple of years and they feel like they deserve a long overdue extended vacation to start their own families and have lots of sex.
Question: I read Solgaleo/Lunala both came from an Ultra wormhole so in a way they could be considered ultra beasts so how will that work with ultra beasts not joining the harem?