The PS Vita version of Emerald Shores went live yesterday on the North American PSN! You can check it out here:

https://store.playstation.com/en-us/product/UP0770-PCSE00859_00-EMERALDSHORES001

It's cross-buy, so the PS4 version comes free with its purchase, and vice versa.

Europe is next! Planned for this month or next.