The Kayou Generation Cheats (DS)

When you clear ALL the songs in a song categories that are already available new
categories will become unlocked 

Unlock Showa Hits (Ai no Memory, Toshishita no Otoko no Ko, Dounimo Tomaranai, Run Away,
Miserarete): Clear ALL songs in Idol, Gakuen Aoharu, Rock, and TV drama categories.

Unlock Bonus tracks (Hageshii Koi, Heartbreak Taiyouzoku, Koi no Dial 6700, Super Monkey
Son Goku): Beat the game (complete Idol, Gakuen Aoharu, Rock, TV drama, and Showa hits
categories).