This game is titled Jam Sessions in North America, Europe, and Australia, and Hiite Utaeru DS Guitar M-06 in Japan.
Press Up(2), Down(2), Left, Right,
Left, Right at the "Free Play" menu to
unlock "I'm Gonna Miss Her" by Brad Paisley, "Needles
And Pins" by Tom Petty and the Heartbreakers, and "Wild
Thing" by Jimi Hendrix. Note: Use A, B, X,
and Y to enter the code when playing in "Lefty"
Strategy guides from GameFAQs