Atlus has yet to ship the two Naruto titles it's releasing with Tomy, but the two companies have already announced another. Naruto Shippuden: Shinobi Rumble, known as Naruto Shippuden Ninjutsu Zenkai! Cha-Clash! in Japan, is a four-player, Smash Bros.-esque fighter for DS starring 16 characters from the Naruto series -- including Naruto, Naruto's friend, and that one guy Naruto is always fighting with.
Shinobi Rumble will be released in North America on February 8 of next year. That gives you plenty of time to convince three friends to pre-order it, so you can enjoy the multi-card wireless multiplayer.