In
addition to spending Halos, whenever you're paying Rodin a
visit over at the Gates of Hell, you can actually use amiibo to unlock the costumes and we're not just talking about using a Link amiibo to get a Link costume, as some are specific (Metroid / Samus amiibo for Bounty Hunter
outfit and etc,) but other amiibo can be used as well, to unlock every purchasable costume and I mean every purchasable costume!