You need to meet certain requirements to attract different types of pinata (for example Whirlms need dirt, Sparrowmints need Whirlms etc).
The overall premise is still to attract into your garden as many different varieties of pinata as you desire. Viva Pinata: Trouble in Paradise maintains a very similar gameplay mechanic to that of the original Viva Pinata Game. Aside from the inclusion of some 30 new piñata species like penguins, boars, crabs, and camels, the game seems to provide significant new gameplay functionality as well, including complete co-op modes, a system of trading cards, a photography mode, and Xbox Live functionality to share custom piñatas and toys. Viva Pinata: Trouble in Paradise improves upon the game play of the first game by adding additional functionality and content. The player is tasked with restoring order by rebuilding the database, achieved (at least in part) by enticing piñatas to inhabit the garden, filling them with candy, and sending them off to parties around the world. As a result, all knowledge about piñata species and which piñatas are needed for which parties has been lost, leading to chaos. Piñata Island is once again under siege by Professor Pester and his gang of Ruffians.While attempting to steal valuable information, the professor has instead managed to delete all of the data stored in the Piñata Central computer.