After you defeat Master, he'll ask you if you want to close the book. Say "no" and then go back to "Sword's House" and save. The book will still be open if you save and if you change a character. But after the credits, DO NOT save. Just simply turn off the game and then back on. When you load, just go to the book with a different character each time to see each of their endings!
Go to the town area with the Moon Lighter or Moon Lighter item. Save the game at Sword's House, then go to the VMU machine in the Monster House. Download the "Moon Lighter" or "Moon Lighter S" mini-game to the VMU. Download the monster to be duplicated to the VMU. After downloading, exit the Monster House, then turn off the Dreamcast without saving again. Start the game again and select the destination save file. Go to the Monster House and load the monster from the VMU into the game. If done correctly, both save files will now have a copy of the same monster.
Insert the game disc into a PC CD-ROM. In the BMP Directory, there will be art files in a .BMP format.
This trick requires a VMU. First thing to do is get as much gold as possible. Sell all your items (dont worry they're not lost), go to dungeons w/e. Than buy as many tokens at the VMU shop as you can. With a mini-game in your VMU (moonlighter, Dungeon IV, etc.) transfer the tokens to your VMU. Do not save the game. Turn off your Dreamcast and back on again. Load up your save file, you will have all your old items, and the money you had before buying tokens. Next bring the tokens from your VMY, back to your game. Sell your tokens. you now have more gold than you started with. Repeat this for infinite gold.
Beat the games once to get the Lady's Cook.
Download a mini-game to the VMU. Turn off the Dreamcast without saving the game. If done correctly, the mini-game will be on the VMU and still will be in the game without having to re-purchase it. <p />Note: To save money, do not save the game after buying the mini-game item.<p />
Finish the Downtown by defeating their bosses to unlock Lady:
To unlock Marion you need the item Marion Doll, which can randomly appear in the dungeon "Doll's House". Once you get it, go to Noiman's house and Noiman will take the doll. Now, go to any dungeon and when you get out of it (by either escaping, losing or finishing it), go back to Noiman's house. After a cut-scene, you'll be able to play as Marion.
Finish the Phantom Zoneby defeating their bosses to unlock Nigel:
Finish the Shrine defeating their bosses to unlock Pyra:
Finish the King's Tombdefeating their bosses to unlock Rao.