catch a zoroark and lead with it. last slot in your party should be a pokemon weak to psychic to trick the AI into using no effect psychic moves on zoroark

power of friendship seriously, feed ur mons some rainbow beans and pet them a bunch. they'll tough out some of the moves i'm like 90% sure thats what the fight is about too, its a test of your friendship zoroark method also works but it feels too cheesy for my liking

i hope you get an extra mcnugget at mcdonalds tysm

poision stall or parayze it

get the tm for toxic and teach it to your pokemon who cab take at least one hit from necrozma then have your team use protect and you will win. toxic is at ather paradise at the boats and protect you have to buy at a pokemon centre i forgot which one

Use Ribombee. Trust

kill him till he dies

using dark type or fairy to counter this god, but make sure they can survive after a hit from Ultra Necrozma