There are a few things you might be thinking of:
* The Trader pinata: This pinata is obtained through a treasure map. You can find the map in the Pirate Cove area. Once you've found the map and followed the instructions, you will earn the Trader pinata.
* The Beggar pinata: This pinata is a rare pinata that can be attracted to your garden by planting specific flowers and having a high Romance rating. It doesn't evolve into a Trader.
* Pinata Evolution: Some pinatas can evolve into different forms, but Beggar and Trader are not part of the same evolution chain.
If you want to learn more about the Trader pinata, you can check out resources online that provide information on treasure maps and how to find them in Viva Pinata.
Let me know if you have any other questions about Viva Pinata!