To raise your number of formees you don't need to have any hearts. All you need to do is go on the internet and go to formee qr codes and scan it with the formee qr code scaner. It's that simple. I've done this before and there are hundreds of codes to scan. You need to unlock the qr code scaner first. You need to play 1 hour to unlock it. Then go to play and hit qr codes. That's all to it.