type in this cheat into the codes menu and you will get a monster,you can only type a cheat in once!:
7 Colored Fish 23771716
Abyss Flower 40387124
Acid Crawler 77568553
Acid Trap Hole 41356845
Air Marmot of Nefa 75889523
Akakieisu 38035986
Akihiron 36904469
Alinsection 70924884
Alligator's Sword 64428736
All-seeing Goddess 53493204
Alpha the Magnet W 99785935
Amazon of the Seasons 17968114
Ameba 95174353
Amphibious Bugroth 40173854
Ancient Brain 42431843
Ancient Elf 93221206
Ancient Jar 81492226
Ancient One of the Forest 14015067
Ancient Sorcerer 36821538
Ancient Tool 49587396
Ancient Tree of Enlightenment 86421986
Ancient Water Turtle 11714098
Angelwitch 37160778
Angry Sea God 18710707
Ansatsu 48365709
Anthrosaurus 89904598
Anti Raigeki 42364257
Aqua Dragon 86164529
Aqua Madoor 85639257
Aqua Snake 12436646
Arlownay 14708569
Arma Knight 36151751
Armaill 53153481
Armed Ninja 09076207
Armored Lizard 15480588
Armored Rat 16246527
Armored Starfish 17535588
Armored Zombie 20277860
Axe of Despair 40619825
Axe Raider 48305365
Baby Dragon (1200/700) 88819587
Barox 06840573
Barrel Dragon 81480460
Barrel Lily 67841515
Barrel Rock 10476868
Basic Insect 89091579
Bat?72076281
Battle Ox 05053103
Battle Steer (1800/1300) 18246479
Battle Warrior 55550921
Beaked Snake 06103114
Bean Soldier 84990171
Bear Trap 78977532
Beast Fangs 46009906
Beast King of the South 99426834
Beast of Talwar 11761845
Beastly Mirror Ritual 81933259
Beautiful Beast Trainer 29616941
Beautiful Headhunter 16899564
Beaver Warrior 32452818
Behegon 94022093
Berfomet 77207191
Beta the Magnet Wa 39256679
Bickuribox 25655502
Big Eye 16768387
Big Insect 53606874
Big Shield Gardna 65240384
Binding Chain 08058240
Bio Plant 07670542
Bite Shoes 50122883
Black Dragon Jungle 89832901
Black Illusion Ritual 41426869
Black Luster Ritual 55761792
Black Luster Soldier 05405694
Black Pendant 65169794
Black Skull Dragon 11901678
Blackland Fire Dragon (1500/800) 87564352
Bladefly 28470714
Blast Juggler 70138455
Blast Sphere 26302522
Blocker 34743446
Blue Eyes Silver Zombie 35282433
Blue Eyes Ultra Dragon 23995346
Blue Eyes White Dragon (300/2500) 89631139
Blue Flame Kagemusha 15401633
Blue-Eyes Toon Dragon 53183600
Blue-winged Crown 41396436
Bolt Escargot 12146024
Bolt Penguin 48531733
Bone Mouse 21239280
Boo Koo 68963107
Book of...