Doc Patchingo
From PinataIsland.info, the Viva Piñata wiki
Doc Patchingo is the village doctor. He is on call 24 hours a day to heal sick piñatas. After you have visited his shop once, you can call him to your garden by selecting a sick piñata and pressing the A button.
If the same piñata becomes sick again, the doctor will charge more to heal that piñata. Healing the same piñata multiple times can become very expensive, so it's best to avoid if possible.
