Bart's Exchange is one of the village shops found in Viva Piñata. Bart will open his shop to you when you reach level 9. By purchasing tinker tickets here, you can have Bart transform items for you. Tickets come in different values -- Bronze, Silver, and Gold. The higher the value purchased, the better chance of a tinker being successful, with bronze having a 25% chance of working, silver a 50% chance, and gold working all of the time. However, gold tickets cost more than ten times the amount of a bronze ticket. If a tinker fails then you lose the original item and you get absolutely nothing.