Onimusha Tactics Cheats for Gameboy Advance
When you have beaten the Phantom Realm the indicated number of times you will receive the corresponding item.
Unlock Genma Agoni:
Beat the Phantom Realm 2 times.
Unlock Oni Armour:
Beat the Phantom Realm 3 times.
Oni Kid is the only hidden character in the game that can be unlocked and to do that you need to complete ALL 16 Floors of Phantom Realm.