Ragnarok Online DS [NDS]

Unlockable: Mirage Tower
To unlock this dungeon in the lower right of the North Sograt Desert, get to 25 in the main quest.

Cheat: Duplicate Equipment
Save your game with at least one skill point. Use the skill point then enter the Mirage Tower. Die and do not save. You should appear again with your skill point(s).

Cheat: Duplicate Equipment
You need to unlock Mirage Tower for this to work. Equip your character with the item you want to duplicate and talk to the manager to access the tower in Single-Player mode. At the Preparation Screen, choose Menu and unequip all items. Go to the Preparation Screen again. Hit the arrow in the lower right to leave. Check your character and you'll have the items quipped, while a duplicates are now in your inventory.