OK so I put my Blitzle in the day care to get it to level 27 to evolve into zebstrika. When I came back, it was level 30 and I thought when I was in battle it would evolve after it, but I was wrong. Can you please help me?
Your Blitzle needs to level up, not just battle. BUT if it did level up, then it is most likely a glitch or maybe its holding the everstone (not likely lol).
Hope this (short) answer helped!