Feed your Vita some cheap games, VT4 is an excellent tennis game and SMB is a fun party game.
Virtua Tennis 4
http://www.zavvi.com/games-ps-vita/virtua-tennis-4/10480779.html
Cheapest pre-order of the game I've seen. Unsure if it's an error by Zavvi.
It seems to be a solid game too and the best Monkey Ball since the Gamecube.