Single post in PokéDex errors

I don't think this has been brought up, but I was trying to evolve my Lyruse just a second ago - is it intentional for it to not evolve next to Melloetta Pirouette form? I was trying because I only have the one Melloetta and the Dex doesn't make it clear that it's a form specific evolution. I changed my Melloetta's form back to Aria and evolved it, I just wanted to make sure it was intentional.