Wild-card
From PinataIsland.info, the Viva Piñata wiki
According to a rumor from Leafos, "On really rare occasions, special pinatas are born. They look different than normal and are a sign of good luck."
A Wild Card is a very rare pinata that is created while preforming a regular romancing process. This is not an evolution of a species. Wild Cards are purely random, and any egg has equal chance of being a wild card.
There will be an alert that appears stating, "You got a rare wild card pinata!" Your rare pinata will have some physical trait that will differ from the rest, a Moozipan with horns for an example.
Every species has a Wild Card version with a larger base value which is increased by 10 times.
- HorstachioWild.jpg
Horstachio from GuruAnt