Castlevania: Harmony of Dissonance Cheats

Unlock Sound Test Mode
Complete the game with the good ending to unlock Sound Test mode.
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Maxim Kischine
Enter 'MAXIM' as a name after completing the game at least once.
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Unlock Boss Rush Mode
Complete the game to unlock the Boss Rush option. There are three levels (easy, normal, and hard) that must be unlocked by playing each in succession.
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Hard Mode
Enter 'HARDGAME' as a name after completing the game at least once.
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Note: Because nGaming does not have all games for Nintendo Gameboy Advance, it is not possible for us to verify that each of the Castlevania: Harmony of Dissonance cheats above is correct. If any of the cheat codes, tips, hints, glitches, walkthroughs, FAQs, easter eggs or unlockables listed above is incorrect, please rate the cheat using the link just below the cheat information. Please note that in a minority of cases, some cheats will only work in certain versions (PAL, NTSC etcetera) of the game. Also, please be aware that it may be the case that nGaming does not yet have all of the Castlevania: Harmony of Dissonance cheats yet - if you know any hints or tips for Castlevania: Harmony of Dissonance on Gameboy Adv, we would greatly appreciate it if you could submit the cheat so we can add it to our database.