In this Debug Room, the NPCs will be listed in a left-to-right, top-to-bottom order, for simplicities sake. The Codebreaker is:
82000420 0144
82000422 0001
[Codes are either not working, or you need to press some set of keys, which I haven't been able to find, and the original poster forgot to add]
Metal Square[]
Pressing A on this square brings up the standard Item Icon Test, present in all the Debug Rooms.
Gabomba Statue[]
This opens up the facial portrait test, present in all Debug Rooms.
Sign[]
Allows you to change the name of all eight Adepts that will end up in your party.
Bulb[]
Does nothing, Pressing A doesn't open any conversation window, not even the standard A menu.
Other Bulb[]
Does nothing, Pressing A doesn't open any conversation window, not even the standard A menu.
Other Sign[]
Gives Felix the Muramasa, and lets him summon Eclipse.
Another Bulb[]
Does nothing, Pressing A doesn't open any conversation window, not even the standard A menu.
Female Innkeeper[]
Opens up a normal conversation with an Innkeeper, who charges 2 coins per Adept.
Healer[]
Provides the normal services a Healer grants.
Weapons Shopkeeper[]
Sells the weapons available in Daila's Weapon Shop.
Armour Shopkeeper[]
Sells the armour available in Daila's Armour Shop.
Item Shopkeeper[]
Sells the items available in Daila's Item Shop.
One-Stop Shopkeeper[]
Sells the Items available in Izumo's One-Stop shop.
Miner[]
Starts a conversation with Sunshine the blacksmith when you don't have any forgeable material.
Woman[]
Starts a conversation with Sunshine's wife.
Fairy[]
Brings up a menu allowing you to raise your parties level by one, by pressing the A button, or pressing Start to raise it by 99
Tour Guide[]
Brings up a menu allowing you to obtain any of either game's items, in unlimited quantities, so long as you have the inventory space.10000
Treasure Chest[]
Brings up the message "You got treasure!" and gives you a Halt Gem, a Mythril Bag, ten Game Tickets, ten Lucky Medals, Hermes' Water, a Muramasa, a Dragon's Eye, an Anchor Charm, a Bone, a Mystic Draught, a Healing Ring. It will also remove Isaac, Garet, Ivan, and Mia from the party.
Venus Djinni[]
Brings up the message "You got a Djinni!" and gives each character in your party apparently all 72 Djinni.
Naribwe's Fortune Teller[]
Brings up the message "The body is being torn apart." damages you, gives you a host of status ailments, and will ultimately down your party unless treated by the Healer.
Yet Another Bulb[]
Does nothing, Pressing A doesn't open any conversation window, not even the standard A menu.
Another Sign[]
Brings up the inventory of your Adepts, in the style of the Sell menu in Shops, but without you being able to sell anything.