From Nintendo website:
Wario makes his mad debut on the Nintendo DS with 180 all-new, factory-fresh microgames!
What really makes this game rock is the DS's touch control. Whether you're slicing veggies flying through the air or ripping the clothes off a sweltering beachgoer, the touch control makes playing Wario's blazingly fast microgames so simple, even a nintendo.com writer can figure 'em out.
Did we only say "touch"? Sorry, we forgot mic control. Yep, a karaoke-mad robot named Mike is on hand to get this party going with special mic-controlled games. For the absolutely first time in video-game history, you can blow sweet nothings into the ear of that someone special or cool off a cup of hot java.