The feature, revealed at Capcom's Captivate event in Rome last week, is a first for the Street Fighter series, and will doubtless be a cause of some concern for PS3 owners given that the Vita version will offer a simplified control scheme, making use of Vita's touch capabilities, and multiplayer battles over 3G.
The Vita release will be the first to offer 12 new characters. From the Street Fighter series come Blanka, Cody, Dudley, Guy, Elena and Sakura; representing the Tekken side are Alisa, Bryan, Christie, Jack, Lars and Lei.
Those 12 characters are already on the Street Fighter X Tekken disc, with Capcom saying last month that they would be unlocked through a DLC update after the Vita version is released in the autumn. PS3 players who buy the Vita version will get the DLC characters for free.
PS3 and Vita players will also be able to share save data, including character customisation and gem loadouts, across both platforms.