I'm a newbie to the world of Monster in my pocket, I found these up in my loft and was letting my son pay with them and he has been asking their names. I believe that most of them are series 1.
Could anyone confirm this for me and tell me what the letters underneath each of then mean? also are there any rare ones? I don't really want my son biting their heads off... I could give him these when he is a bit older.