Its where you tell me how many useible pokemon are in your boxs. Say your like me and have 14. Then I would pick 6 random numbers from 1 till 14. Say 6,7,3,4,8,9. My team would be the 6th pokemom in my box be my lead, 7th my 2nd pokemon and so forth. (the first pokemon picked must be your lead, ex. Number 6 has to be my lead I can not change it during team preview). Interested?