Here is the full list of all 50 Viva Piñata: Trouble In Paradise achievements worth 1,000 gamerscore.
Restore 30 of Piñata Central’s Computer Records
Restore all of Piñata Central’s Computer Records
Complete all Challenges in all Regions
Complete all Challenges in Region 5
Complete all Challenges in Region 3
Complete all Challenges in Region 4
Complete all Challenges in Region 7
Complete all Challenges in Region 6
Complete all Challenges in Region 2
Create 10 Wildcard Piñatas
Complete all of Langston’s Destination Challenges in Region 1
Make all Desert species resident
Make all Arctic species resident
Earn a Gold Combat Medal
Teach 10 Piñatas all of their Tricks
Create 10 sets of Twin Piñatas
Win a Piñata show
Win 10 Piñata races
Knock 1 Sweet into a Seed Hole from Long Distance
Evolve a Polollybear from a Fizzlybear
Evolve a Hoghurt from a Rashberry
Evolve a Moojoo from a Doenut
Knock 5 Sweets into Seed Holes using the Shovel
Evolve a Parmadillo from a Fudgehog
Teach a Piñata all of their Tricks
Evolve a Pieena from a Pretztail
Evolve a Chocstrich from a Cluckles
Have a Spectral Locomotive in the garden
Have a Woo Woo Train in the garden
Wear a Piñata 'Costume'
Collect milk from a Flapyak
Take a Special Photograph
Take 10 Photographs (Normal)
Make 3 Arctic species resident
Win a Piñata race
Grow all Desert plants to maturity
Make 3 Desert species resident
Use 10 different Piñata Cards
Obtain a Choclodocus
Grow all Arctic plants to maturity
Restore 10 of Piñata Central’s Computer Records
Packet contains all surface types
Create 1 set of Twin Piñatas
Create a Wildcard Piñata
Use a Piñata Card
Obtain a special Piñata from the website (or trade one with someone who has)
Win 10 Piñata shows
Play One Box Co-op for 1 hour
Play One Box Co-op for 3 Hours
Play 4 Player Online Co-op for 1 hour