There's some input lag, and it doesn't really fit with the theme of the game-anywhere "the world is in play" marketing theme of the PS Vita. But then again, its sticks and buttons just don't have that clicky-click of a fight stick, either. So this enterprising Japanese modder whipped up a solution allowing the user to feel like he's playing full-scale Ultimate Marvel vs. Capcom 3 on a screen a fraction of the size.

Modder hacks an arcade stick to work on the PlayStation Vita" [Eventhubs]