Well there's a LOT of speculation here, but there are only 3 moves in the MSG that have a base power of 160, them being Eternatus' Eternabeam, Tinkaton's Gigaton Hammer and Necrozma's Prismatic Laser. If (and this is a BIG IF) the Prismatic Laser gets the same stats as the Gigaton Hammer, then Ultra Necrozma could soar past even Mega Mewtwo Y. I would like to hear your thoughts on this
by Most_Effective_4937