Carbunkle
Defeat Carbunkle and successfully complete the Extra Course level to unlock him in Double Puyo Pop.
Satan
Defeat Satan in the G. Dark Prince Castle level to unlock Satan in Double Puyo Pop.
Sounds
Beat Kaakun twice in the Trial Labyrinth for Card 18. In the options menu, select the gallery and choose option 18 to view character artwork. Press the A button to hear all of the game’s sounds.