It's cards plus horse racing. It makes sense in context!
http://www.nintendoworldreport.com/news/42079/new-gamefreak-title-localization-pocket-card-jockey
One of GameFreak's previously Japanese only titles will make its way west this spring.
The title called "Solatiba" in Japan will release as Pocket Card Jockey, a 3DS eShop title. The game combines the disparate arts of solitaire and thoroughbred horse racing as you use the cards to create champion racers and studs.