"As was semi confirmed via some leaky achievements, Rare has informed us that four player online co-op will be a part of Viva Piñata: Trouble in Paradise and (best part) it won't be gimped!
Just like local co-op, four player online co-op will allow players to join the "host" in their garden and only their garden. Meaning that everyone who enters the a garden will only make changes or do damage to the host's garden while having no effect on their game saves. All four players will have the ability to interact with the garden and have access to normal player tools. Simply put, there's no co-op gimpage! Not only will players be able to visit and play in eachother's gardens, but everyone can partake in 2D top down races, competitions and win monthly leaderboard prizes. It's like the online Viva Piñata experience we've always wanted! Also, we've been told to expect much more Trouble in Paradise info (including more co-op specifics) to be released during Leipzig, so keep your eyes peeled."