There are two versions of the song Sunkiss Drop, ~Alison side~ and ~jun side~. When you select the song normally, you will usually get to play ~Alison side~. To play ~jun side~ every time, press Start and select "Sort" until your song wheel is in Alphabetical mode. Select in order: D, R, O, P, and S, then select the song Sunkiss Drop, and you will get to play the song as ~jun side~.
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Complete all of Alice's Normal stages in Street Master Mode.
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Complete all of Baby-Lon's Normal stages in Street Master Mode.
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Complete all of Louis Concent III's Normal stages in Street Master Mode.
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Complete all of Queen Zukin's Advanced stages in Street Master Mode.
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Unlock Songs
Play 10 songs in Game Mode to Unlock Sunkiss - Jun.
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Complete all of Yuni's Advanced stages in Street Master Mode.