And lastly, a fan was able to get all 3 special mystery pins from the Gachapon. Here are the designs:
Do you want the exhibit-only goods, but don’t want to buy a plane ticket to Japan? One of our fellow fans has suggested this site as an option: https://otsukai.manga.tokyo/
Disclaimer: I have never used that site or its services and am not affiliated with them in any way. Apparently you’ll need a paypal account to pay. (If you want the rascal-trooper cross-over goods, they have completely sold out at this time. The Gallery is hoping to get a new shipment soon!)