Shiren 1 SFC:Debug Mode

Debug mode is an unused mode in Mystery Dungeon 2: Shiren the Wanderer originally used by developers to test things in-game.

Accessing

Changing the bytes at 8000 and 8001 in a headerless ROM (or 8200 and 8201 in a headered ROM) from FF to 00 enables a slew of debugging functions (alternately, enter Pro Action Replay (PAR) codes C0800000, C0800100).

Functions

Controller 1 Functions:

Start: Skip to the next floor and increase Shiren's level by 1.
B+Start: Reveal locations of all monsters on the current floor.
Y+Start: Reveal locations of all items on the current floor.
B+Y+Start: Kill all monsters on the current floor.
R+Start: Display full map of the current floor.
B+R+Start: Opens a menu allowing the selection of any item in the game.

Works with the unofficial translation, however most of the text is unreadable.

Y+R+Start: Turns off the background music. The only way to turn it back on is to reset.
B+Y+R+Start: Opens a sound test menu.

Controller 2 Functions:

Start: Allows for the entire current floor to be viewed using the D-Pad on controller 2. The coordinates of the portion currently on-screen are displayed, as well as map IDs and the type of the current tyle. The screen moves in tiles, which are 32 pixel each.
Shift (held) makes the screen black.
X: Displays Shiren's coordinates.
Y: Opens a sprite and animations test menu including monsters, characters, and items:
- A plays the animation.
- B closes the menu.
- Up/down to move up and down the cursor of the primary menu (monster select).
- Left/right or X/Y to move up and down the cursor of the secondary menu (direction the monster is facing).
- Start changes whether it plays the normal animation or an alternate one.

While in debug mode, if the player heads south of Valley Inn, the debug room can be accessed.

Items Selection Menu

Pressing B+R+Start on controller 1 opens a menu to add any item to the inventory.

Items
Herbs	Weapons
Scrolls	Shields
Staves	Bracers
Pots	Arrows
Food	Others

Herbs
Medical Herb	Revival Herb	---	Poison Herb
Otogiri-So	Vanishing Herb	Life Herb	Confusion Herb
Happy Herb	Wriggling Herb	Expansion Seed	Sleep Herb
Vision Herb	Unlucky Seed	Contraction Seed	Weed
Dragon Herb	Super-Unlucky Seed	Speech Seed	New Item
Invincible Herb	Kigny Tribe Seed	Power Herb	New Item
Angel Seed	Forgetful Herb	Antidote Herb	New Item

Weapons

The Weapons and Shields sub-menus allow selecting the upgrade/downgrade value after the item is selected.

Scrolls

Shields

Staves

Bracers

Pots

Arrows

Food

Others
Meat
Goal 1
Goal 2
Goal 3

All the options in this menu lead to a sub-menu to select monster meat and monster level, however only the first option is for monster meat. The others give goal items that end the Adventure and glitch items.