I have taken that down, though it was not easy.
Oh I can kill him too. He only uses that move in the last 25% of his health, which he never reaches without just dying. But if you mess up his health, you will almost assuredly die to that move if it comes out. I've tested with Topple resist and he seems to always succeed with that move.
I can actually survive it with Beam Res Up but only barely.