My musical GBA/DS imports:

Rhythm Tengoku
Rhythm Tengoku Gold
Daigasso! Band Brothers
Daigasso! Band Brothers Request Selection
Daigasso! Band Brothers DX
Osu! Tatakae! Ouendan!
Moero! Nekketsu Rhythm Damashii Osu Tatakae Ouendan 2!

Games I will keep forever.