You can always try seeing if there are two people in the pinata thread willing to buy no post cooldown, so you all can just spam the hit button non-stop, that should help quite a bit. Alternatively, you can try translating by using MTL and editing it into readable English, that's also enough to get a medal~ ... Or you can try taking over NUF and forcing Tony-chan to give you a medal, that should also work~
I don't know how people can get medals here apart from The Piñata Game. Do people nowadays get medals and if so, then for what reasons? Meanwhile we can just play The Piñata Game and hope for the best?