Yu-Gi-Oh: Falsebound Kingdom Cheats

 Gold Coins:
Push Up(2), Down(2), Left, Right, Left, Right, B, A (the "Konami code") on an empty piece of land while playing a mission. The game will laugh at you and say "Yu, Yu" if you have entered the code correctly. You will get more Gold Coins every time this is done.
User Cheat by Corey

Joey Weeler as main character:
Finish the game as Kaiba and Yugi to unlock Joey as a selectable character when you load your game.

Fusions:

B. Skull Dragon = Red Eyes Black Dragon + Summoned Skull
Barbarian Double Impact = Swap + Lava Battle Guards
Blue Eyes Ultimate Dragon = Blue Eyes White Dragon X3
Cosmo Queen = Dark Elf + Mystical Elf
Crimson Sunbird = Mavelus + Faith Bird
Dark Burning Magic = Dark Magician + Dark Magician Girl
Gaia The Dragon Champion = Gaia The Fierce Knight + Curse of Dragon
Gate Guardian = Sanga of the Thunder + Suijin + Kazejin
Gemini Double Radiation = Both Gemini Elves
Illusionary Beast = Gazelle + Berrformet
Magician Of Black Chaos = Dark Magician + Chaos Ritual
Magnet Valkyrion = 3 Magnet Warriors
Meteor Black Dragon = Red Eyes Black Dragon + Meteor Dragon
Rabid Horsemen = Mystic Horsemen + Battle Ox
Thousand Dragon = Time Wizard + Baby Dragon
Triangle Ecstasy Spark = All three Harpy Ladies
Twin Headed Thunder Dragon = Thunder Dragon + Two Headed King Rex
User Cheat by David

Available monsters:
The following lists most of the monsters in the game.

Alpha The Magnet Warrior
Anasatsu
Aqua Dragon
Aqua Madoor
Armored Lizard
Axe Raider
Baby Dragon
Barrel Dragon
Basic Insect
Battle Ox
Beast Tamer
Beaver Warrior
Beta The Magnet Warrior
Bickuri Box
Black Land Fire Dragon
Black Luster Soldier
Blue Eyes White Dragon
Buster Blader
Castle of Dark Illusions
Celtic Guardian
Cosmo Queen
Crawling Dragon
Curse of Dragon
Cyber Commander
Cyber Saurus
Dancing Elf
Dark Chimera
Dark Elf
Dark Magician
Dark Magician Girl
Dark Plant
Dark Rabbit
Dark Witch
Dragon Piper
Dragon Seeker
Dunames Dark Witch
Dungeon Worm
Enchanting Mermaid
Evil Dark Magician
Fairies Gift
Faith Bird
Feral Imp
Fiend Kraken
Flame Cerebrus
Flame Swordsman
Fortress Whale
Gaia The Fierce Knight
Gama The Magnet Warrior
Garoozis
GateGuardian
Gazelle King of Mythical Beasts
Gemini Elf (Blonde)
Gemini Elf (Brunette)
Giant Insect
Giant Red Sea Snake
Giant Soldier of Stone
Giltia The D. Knight
Great Moth
Gyuketenno Megami
HaneHane
Harpie Lady (Blonde)
Harpie Lady (Blue)
Harpie Lady (Red)
Harpie's Pet Dragon
Hercules Beetle
Hitotsume Giant
Horn Imp
Hunter Spider
Illusionary Gentlemen
Ilusionist Faceless Mage
Insect Queen
Invitation to a Dark Sleep
Jelly Fish
Jinzo
Judge Man
KairyuShin
Kaiser Dragon
Kanan The Swordmistress
Kazejin
King of Yamimakai
Kuriboh
Labyrinth Tank
Larvae Moth
Launcher Spider
Lava Battleguard
Lord of D.
Machine King
Magician of Black Chaos
Magician of Faith
Man Eater Bug
Mavelus
Metalzoa
Meteor Dragon
Millenium Golemn
Moisture Creature
Mountain Warrior
Mystic Horseman
Mystical Elf
Neck Hunter
Obelisk the Tormentor
Panther Warrior
Parrot Dragon
Penguin Knight
Perfectly Ultimate Great Moth
Pumpking the King of Ghosts
Queen of Autumn Leaves
Reaper of the Cards
Red Eyes Black Dragon
Red Eyes Black Dragon
Red Eyes Black Metal Dragon
Rocket Warrior
Rogue Doll
RyuKishen Powered
Saggi The Dark Clown
Sanga of Thunder
Seiyaryu
Serpent Night Dragon
Shadow Ghoul
Silver Fang
Slifer the Sky Dragon
Slot Machine
Spike Seadra
Stuffed Animal
Suijin
Summoned Skull
Swamp Battleguard
Sword Stalker
Tao the Chanter
The Ghoul with a big appetite
The Snake Hair
The Winged Dragon of Ra
Three Headed Geedo
Thunder Dragon
Tiger Axe
Time Wizard
Twin Headed King Rex
Uraby
Water Girl
Winged Dragon Guardian #1
Zoa
Zombie Warrior

God items:
If you complete the game more than once, you may get more than one of the God "items" (Obelisk's Soul, Slifer's Orb, Ra's Eye). If so, you can use the God once for every God "item" that you have.

Armored Lizard:
Start the game with Kiaba. One of Kaiba's starting monsters is Armored Lizard.
User Cheat by Tom

Octoberser:
In Yugi's Story on the Turbulent Waters level, send someone down towards the base called Thor-Mount. About half-way down you will encounter the monster Octoberser. Win and it will join your army.

Rex Raptor:
You can get Rex Raptor is after the battle with Weevil. He sends out about four warriors. After beating them, take him head on with two of your Marshals. He carries a Two Headed King Rex, Megazowler, and Uraby with him.

Ryukishin-Powered:
Play as Kaiba. After you complete the first level, if you liberate every village, you will have unlocked him.

Weevil:
On the level when Kaiba is recruiting new soldiers he encounters Weevil. He asks Weevil to surrender and fight for him. Weevil says no! So you start fighting his soldiers send out your best marshal and take him head on. He has with him a Hercules Beetle, a Giant insect, and Basic Insect.

Black Luster Ritual:
Defeat the Shadi who has Black Luster Ritual.

Black Luster Soldier:
Use Black Luster Ritual on Gaia the Fierce Knight.

Magician Of Black Chaos:
Use Black Luster Ritual on Dark Magician.

Meteor Dragon:
In Kaiba's campaign, play the Dragon Lair mission. After defeating Lord Of D. at Fort Den you will get Meteor Dragon.

Sanga Of The Thunder:
In Yugi's campaign, play the Break Free mission. Start from your base and walk south in the middle of the mountains all the way down to the left-hand corner of the map. You should encounter Sanga Of The Thunder.

Serpent Night Dragon:
Play the Joey campaign. Go to the mountains behind the main castle. REMEMBER: Only one castle is occupied. Wait until it gets dark then walk up behind the occupied castle and near the highest mountains to find Serpent Night Dragon. After defeating him, you also get a Swordstalker and an Invitation To A Dark Sleep.

Seiyaryu:
On Kaiba's campaign, play the Dragon Lair mission. After defeating Lord Of D. at Fort Hall you will get Seiyaryu.

Slifer's Orb:
Finish the game with Kaiba.

Silver Fang:
In the first level on the Yugi story mode, wander around in the trees. You will be ambushed by a Silver Fang. It has about 750 health and should not give you trouble. When you defeat it, it joins your army.

Soul Of Obelisk:
Finish the game with Yugi.

Thunder Dragon:
In Kaiba's Campaign, play the Dragon Lair mission. After defeating Lord Of D. at Fort Nest you will get Thunder Dragon.

Tiger Axe:
You can get Tiger Axe by liberating a town while fighting Rex Raptor's army.

Time Wizard:
In the Spellcaster mission in Yugi"s campaign, liberate the town research guild.

Winged Dragon Of Ra:
Finish the game with Joey.

Summoned Skull, Beast Of Gilfer, Illusory Gentleman, and Neck Hunter:
In the Yugi campaign's Badlands mission, go to Tower-Pegasi. Defeat Summoned Skull then make a trip to Tower-Deneb. In the wasteland in between the towers, you will find this team: -Beast of Gilfer, Illusory Gentleman, and Neck Hunter. Defeat them and they will be yours.

Barrel Dragon, Slot Machine, and Launcher Spider:
On the Bandits Again mission in Kaiba's campaign, defeat Bandit Keith to get Barrel Dragon, Slot Machine, and Launcher Spider.

Battle Ox, Dragon Seeker, Swamp Battle Guard:
In Joey's campaign on his second mission, walk to the mountains on the left side of your base, at the bottom of the mountain near the valley. Keep walking around where the mountain meets the valley and your should encounter Battle Ox, Dragon Seeker, and Swamp Battle Guard

Blue-Eyes White Dragon and Lord Of D.:
On Kaiba's campaign, play the Dragon Lair mission. Defeat Lord Of D. at Fort Burrow and three Blue-Eyes White Dragons and Lord Of D. will join your team.

Jinzo, Giant Mech Soldier, Cyber Saurus:
Defeat Bakura in mission 15, then Espa Roba will join your party with Jinzo, Giant Mech Soldier, and Cyber Saurus.

Skull Night, Kazejin, and Pumpkins The King Of Ghosts:
On the mission where you fight Kaiba (the last mission in Joey's campaign), walk around at the bottom of the mountains closest to Kaiba near Fort Ru-Ma-Pann to find Skull Night, Kazejin, and Pumpkins The King Of Ghosts.

Suijin, Fortress Whale, Aqua Dragon:
On Yugi's Campaign, play the Scorched mission. Travel right toward the mountains where the ocean sticks out the farthest on land. You will meet those three monsters.

Buster Blader and Cyber Commander:
On Kaiba's campaign, play the Dragon Lair mission. Walk straight from your starting fort to Fort Den. You will be challenged by A Buster Blader and Cyber Commander along the way.

Judgeman, Kaiser Dragon:
On Kaiba's campaign, play the Dragon Lair mission. After defeating Lord Of D. at Fort Lair you will get Judgeman and Kaiser Dragon

Sengenjin and Flame Cerebrus:
On Joey's campaign, play the Quick Attack mission. Wander around the mountains to the right of the base Beyzon and you should encounter Sengenjin and Flame Cerebrus. There are only two of them.

Recommended Challenge mode characters:
Go to challenge mode and select the Yugi side. Select Mia as your character. Then, select all three Harpie Ladies. Give them all Electro Whip. Use your special every time and your opponent will die in two turns.