Sorry, I don't know. I wish I knew, and if it was me, I'd saaay: Trade with Deep Sea Scale(You know, the Gorebys one) above level 40, but I don't know what Plateman would say.
Ok, you asked about Finneon's evolution, I answered. You asked about Divineon, and I said I'm not sure, but here's my guess. I confirmed that I am not Plateman.