Master romancer
(Still being edited/added on to)
Tips:
Before a piñata hatches from an egg or a cocoon it will not be considered a piñata and you will not have a life taken away if you romance your two adult piñata quick enough (very effecrive with whirlm)
I can't stress this point enough use fences to protect prey piñata from predators when trying to breed them (unless they are birds)
Don't buy romance cadies all at once buy 4 or six at most they will spoil if you don't use them quick enough and piñata will eat it and get sick.
Don't bother getting all of the coins in the romance games its not worth it and just wastes time
When you are finished getting the "Master romancer" reward for a species save 4 of them and sell the rest so you can have every variant of piñata in your garden while still making a nice chunk of money
If you have a cluckles having it sit on an egg will make it hatch faster!
When you master romancing piñata that are able to transform into other piñata (E.x. Sparrowmint) save 6 piñata instead of 4 to transform the extra 2 without wasting money at Gretchen's
Alternatively to the point above, if a piñata has an easy transformation process (E.x. Taffly>Reddhot) you obtain its master romance badge you can transform every new piñata you've bred(in this case we'll use taffly again) into Reddhot's halving the process of romancing them over and over again. However you still will have to romance the Reddhot's at least 1 time. [This method will leave you with one life for the only piñata that has to be romanced to get the reward, so don't say I didn't warn you.] <credit to 'Soulfire-of-Void' for this tip>