400

Monsters with 400 ATK

 * Ally Salvo
 * Ancient Jar
 * Apprentice Magician
 * Arcanite Magician
 * Archfiend Marmot of Nefariousness
 * Beast of the Pharaoh
 * Blackwing - Etesian of Two Swords
 * Blade Rabbit
 * Bombardment Beetle
 * Bone Mouse
 * Card Blocker
 * Card Ejector
 * Card Trooper
 * Change Slime
 * Chrysalis Dolphin
 * Counselor Lily
 * Cross Porter
 * Cyber Larva
 * Destiny Hero - Dread Servant
 * Djinn Prognosticator of Rituals
 * Elder of the Six Samurai
 * Expressroid
 * Fabled Miztoji
 * Flame Viper
 * Fleur Synchron
 * Fungi of the Musk
 * Gauntlet Warrior
 * Gladiator Beast Secutor
 * Goblin Calligrapher
 * Horseytail
 * Injection Fairy Lily
 * Kagemusha of the Six Samurai
 * Karakuri Spider
 * Key Mace
 * Kinka-byo
 * Kozaky
 * Mist Valley Baby Roc
 * Mist Valley Windmaster
 * Mystic Lamp
 * Naturia Antjaw
 * Naturia Beetle
 * Naturia Rosewhip
 * Oilman
 * Oppressed People
 * Plaguespreader Zombie
 * Pot the Trick
 * Power Supplier
 * Psychic Kappa
 * Rainbow Flower
 * Shire, Lightsworn Spirit
 * Sinister Sprocket
 * Soul-Absorbing Bone Tower
 * Spore
 * Spherous Lady
 * The Unhappy Girl
 * Tongue Twister
 * Totem Dragon
 * Unifrog
 * Valkyrie of the Nordic Ascendant
 * Vengeful Shinobi
 * Vylon Sphere
 * Warlock of the Ice Barrier
 * Water Spirit
 * Witch Doctor of Sparta
 * Worm Millidith
 * X-Saber Axel

Monsters with 400 DEF

 * A-Team: Trap Disposal Unit
 * Abyss Flower
 * Ally of Justice Garadholg
 * Arcane Apprentice
 * Armed Sea Hunter
 * Aztekipede, the Worm Warrior
 * Beast Striker
 * Bee List Soldier
 * Blackwing - Gale the Whirlwind
 * Blizzard Warrior
 * Boneheimer
 * Brron, Mad King of Dark World
 * Cactus Fighter
 * Card Blocker
 * Card Ejector
 * Card Trooper
 * Cherry Inmato
 * Chrysalis Chicky
 * Cross Porter
 * Crystal Beast Amethyst Cat
 * Dark Hunter
 * Dark Plant
 * Dark Zebra
 * Deep Sea Diva
 * Destructotron
 * Dokuroyaiba
 * Dragunity Brandistock
 * Dread Dragon
 * Emissary of the Oasis
 * Fabled Lurrie
 * Flamvell Uruquizas
 * Frequency Magician
 * Gadget Arms
 * Gemini Scorpion
 * Genex Ally Birdman
 * Genex Recycled
 * Genex Searcher
 * Gilasaurus
 * Gladiator Beast Laquari
 * Gladiator Beast Murmillo
 * Gladiator Beast Torax
 * Goblin Calligrapher
 * Guardian Baou
 * Gusto Egul
 * Hydra Viper
 * Jurrac Guaiba
 * Jurrac Stauriko
 * Jinzo 7
 * Korogashi
 * Kozaky
 * Krebons
 * Larvae Moth
 * Laval Miller
 * Legendary Six Samurai - Kizan
 * Lifeforce Harmonizer
 * Magician of Faith
 * Marauding Captain
 * Mask of Darkness
 * Mech Mole Zombie
 * Meda Bat
 * Mist Condor
 * Molten Zombie
 * Morphtronic Boomboxen
 * Naturia Dragonfly
 * Naturia Guardian
 * Naturia Spiderfang
 * Nettles
 * Night's End Sorcerer
 * Nightmare Horse
 * Oilman
 * Pot the Trick
 * Power Supplier
 * Sacred Crane
 * Scrap Hunter
 * Shien's Advisor
 * Skelengel
 * Skreech
 * Speed Warrior
 * Sunny Pixie
 * Symphonic Warrior Basses
 * The Fabled Cerburrel
 * Time Wizard
 * Tomozaurus
 * Unifrog
 * United Resistance
 * Vylon Sphere
 * Weather Control
 * White Dolphin
 * Woodland Sprite
 * Worm Opera
 * Worm Prince
 * Wretched Ghost of the Attic
 * Wynnda, Priestess of Gusto
 * X-Saber Wayne
 * XX-Saber Garsem