Mystery Bag is a special crate that is slowly filled with cosmetics from previous events. By spending 30 Oranges the player might receive one of old cosmetics, rather than needing to wait for the following year for a chance to receive the item. The player has a very high chance of just receiving 15 oranges instead of a cosmetic, however. It should be noted that the bag is filled at Fruitbat Factory's discretion and thus does not contain all of the old cosmetics, and not all cosmetics are guaranteed to head to the mystery bag. Since 2017, there has been a notable decrease in cosmetics heading to the mystery bag.
Mystery bags have a limited range of contents, as certain unique and noncosmetic items are not added to it. For instance, the bag does not contain fields, and as a result, event-specific boards such as Sakura Smackdown and Icy Hideout have no method to unlock them other than from their respective events. The bag also does not contain costumes, and thus the summer and pigformation variant, among others, are not contained within the bag. If all items have been unlocked from the Mystery Bag's reward pool, the bag will no longer be purchasable. However, if new items are added to the bag, it will become available for purchase again.
- Rather strangely, the Christmas color pack for and is not in the mystery bag, as opposed to the rest of the cast.
- Sunglasses have been consistently added to the mystery bag for new characters. They are often added for new characters during the following summer event.
- ↑ Bag contents tested by user Ryu Xero from the OJ R&D server.