As far as I can tell, it doesn't work at all. I own three PCH-2000 systems, and have Rayman Legends on two of them. I setup ad-hoc mode, and they do not see each other. I get an "A" in the upper left corner of each, and have tried hosting and joining with each system, and they don't see each other at all. As far as I'm concerned, Ad-hoc is a sham on the vita.