Code Title: Special cards
In a trade shop, save and quit. Select "Continue" and in "Special" you should have different cards.
Code Title: Recommended deck
When you choose your deck, choose the Fire Deck. Later in the game you will get Bollshack Dragon.
The best deck to use is the Light Civilization deck.
Code Title: Save in the submarine
You can only enter the submarine after you have accepted the last plaque. Stand outside the submarine, press [Start], highlight "Save" and walk into the submarine. Press Start and notice that "Save" is black, and the pointer is on it. Select "Save" to save your game. As long as you do not move the pointer away from "Save", you can repeat this as many times as desired.
Code Title: Duel Room
Successfully complete the game to unlock the "Duel Room" option.
