Gotcha. To me, it is asking for that specific creature, not any part of it's evolution. To the game, it acts as a different creature altogether, so I can understand why it does that. I don't know. While I could sympathize with the feeling of just evolving something, just to have to catch i for a quest would be a burn. I personally wouldn't expect the game to just accept the evolved one though, as it asked for that specific creature.
For the Derwin quests, I don't find it annoying that I have to have the specific evolution he asks for. For example, in Yule, he asks for a creature that piles Snow on its head. Sasquitch doesn't have snow, but Sasquatch does.
For the quest TC is talking about, I find it dumb that it doesn't accept the evolved Sunshine. You just need to find "a familiar that looks like the Sun".
I understand what you mean. I suppose that it just assumed that you would only have just caught the first evolution outside of town, and turn it in. It was fairly early also, so it probably didn't think you would have the 2nd evolution by then.
I get it now though. The description is deceptive.