My my, g/fur actually looks like g/fur instead of being a pozzer parade. Hell must've frozen over.

Assume I’m a retard. I’m rank b in the story so almost done. I tried to do a ranked battle but it said my team wasn’t right. What are the rules for ranked battles? Do you only get to bring one mega stone? Is it 3 or 6? I hear you can get the Greninja stone in half an hour if you’re not retarded but I am so I need help