I love that animation! I'm also a fan of Poipole's little stubby arm slap :)Thought the same thing. Ultra Necrozma with the Black parts looks way better than without. And it's nice that it just seems to disassemble when it's KO'd.
So Necrozma seriously just NUKES things. Ok, I'm game.
THERE YOU GO
Light That Burns The Sky , in other words, Ultra Necrozma's Z-Move at last!