Through the capsule by either spinning with Coins, MP and RT. OR through in-game seasonal events (when you capture an item in a match for example - that could give out a coupon box).
Well, technically the MP capsule should also give you Coupons. Can anyone confirm that, though? https://www.toyheroes.net/forum/ind...g-balance-changes-04-17-2018.3177/#post-19909 "Coupons can be obtained through the Capsule Machine" ^ I assume you can earn coupons with all the options.