UR Evolution Question

Hey guys, just a quick question. I have two Victorious Fionna cards I want to evolve, and when I go to combine them, the evole button is grayed-out. They're the lower level cards, so maybe I'm missing something? Do they need to be max-leveled before I evolve them or???

Perhaps you have one of them as a leader or locked. You don't have to max them out, but you really should max out all UR cards before evolving so you get the max carry-over stats.... and yeah for UR cards that's a lot of difference on the final result.... a lot!

Well, I did have one as a leader, but I changed it--still locked out of being able to evolve. I'm kind of glad since I realize I should max them first. I was just uber excited when I saw the 2nd one open for me from some random trash mob in pve.

Gah...I just re-checked, and she was still leading my Battle party. No worries! On to leveling!