But I think they make those figures based on popularity. Thus far, the Play and Formation Arts lines line-up consist of the more popular characters in the series, I'd say, those who are iconic and whom people would recognise that they come from the KH series right at the first glance. Probably they feel like TAV, MX, or Vanitas aren't popular enough to receive the Arts treatment? After all, they hail from the PSP installment of the game which the general crowd so loves to refer to as one of the many "spin-off, non-numbered titles".