Rosario to Vampire Cheats - Nintendo DS
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Unlock Characters
Beat the game with the following characters winning the "Miss Youkai Gakuen" contest to unlock additional characters:
Kotori Ginarayu - Moka, Kurumu, Yukari, or Mizore.
Ruby Toujou - Kotori.
Unlock BGM and Voice for Gallery
After you beat the game, you unlock the whole rest of the BGM and unlock some of the Voices you hear in conversations.