On Real Evo, I caught Squirtle as a farm wanderer while sitting in a town idle. I immediately equipped it with Black Glasses. (This was a Dark-type only file.) Instead of evolving into Squad Leader Squirtle, it evolved into Wartortle, and thence to Blastoise.
On Real Evo, I believe that when a pokemon has branching evolutions, it always evolves into the lower pokedex number first. Your first Cosmoem always evolves into Solgaleo, for example. But apparently it doesn't check for pokemon with the SAME pokedex number first? I expected it to evolve into Squad, since that has a lower pokedex number.