Card evolutions

Card Evolutions, or Retrained monsters is the term used to describe a monster that has been reprinted with a new effect and slightly different name, but with the same base ATK and DEF, and usually Level and appearance as well. Examples include "Battle Ox" to "Enraged Battle Ox" and "Magician of Black Chaos" to "Dark Magician of Chaos". Special cases are "Harpie Lady 1", "Harpie Lady 2", and "Harpie Lady 3", which all have the same stats as the original "Harpie Lady", but are not all representing the same creature. Rather, they are the three sisters from "Harpie Lady Sisters".

The term "retrained" comes from "Retrained Elf Swordsman," a translation of the Japanese name for "Obnoxious Celtic Guard", who is a retrained version of "Elf Swordsman" ("Celtic Guardian").

Retrained monsters are not to be confused with upgraded ones, such as "Cannon Soldier MK-2". These, like retrained monsters, are clearly based on existing cards. However, unlike retrained versions, these have higher ATK and/or DEF and an effect meant to improve upon the original.

Retrained Cards

 * Ansatsu → Strike Ninja
 * Atlantean Pikeman → Atlantean Assault Trooper
 * Battle Ox → Enraged Battle Ox
 * Black Luster Soldier → Black Luster Soldier - Envoy of the Beginning
 * Blue-Eyes White Dragon → Galaxy-Eyes Photon Dragon
 * Celtic Guardian → Obnoxious Celtic Guard
 * Dark Blade → Dark Blade the Captain of the Evil World
 * Doll of Demise → Malice Doll of Demise
 * Dryad → Elemental Mistress Doriado
 * Gaia the Dragon Champion → Gaia Dragon, the Thunder Charger
 * Gaia the Fierce Knight → Swift Gaia the Fierce Knight
 * Giant Orc → Tardy Orc
 * Harpie Lady → Harpie Lady 1/Harpie Lady 2/Harpie Lady 3/Cyber Harpie Lady
 * Magician of Black Chaos → Dark Magician of Chaos
 * St. Joan → Guardian Angel Joan
 * Summoned Skull → Skull Archfiend of Lightning
 * Swordsman of Landstar → Comrade Swordsman of Landstar

Alternate Cards

 * Abyss Flower → Dark Plant
 * Acid Crawler → Petit Moth
 * Amphibious Bugroth → Ground Attacker Bugroth
 * Ancient Lizard Warrior → Stone Armadiller
 * Ancient Tree of Enlightenment → Trent
 * Archfiend Marmot of Nefariousness → Obese Marmot of Nefariousness
 * Armored Rat → Prevent Rat
 * Armored Starfish → Hitodenchak
 * Armored Zombie → Zanki
 * Banisher of the Light → Banisher of the Radiance
 * Basic Insect → Invader from Another Dimension
 * Bat → Dark Shade
 * Beaked Snake → Dig Beak
 * Beautiful Headhuntress → Warrior of Tradition
 * Binding Chain → Mystical Capture Chain
 * Book of Life → Book of Taiyou → Book of Moon → Book of Eclipse
 * Butterfly Dagger - Elma → Gladiator Beast's Battle Gladius
 * Call of the Mummy → Valhalla, Hall of the Fallen → Teleport → Herculean Power
 * Change Slime → Gruesome Goo
 * Combo Fighter → Combo Master
 * Crass Clown → Clown Zombie
 * Crawling Dragon → Crawling Dragon #2 → Dragon Zombie → B. Dragon Jungle King
 * Crystal Beast Amber Mammoth → Advanced Crystal Beast Amber Mammoth
 * Crystal Beast Amethyst Cat → Advanced Crystal Beast Amethyst Cat
 * Crystal Beast Cobalt Eagle → Advanced Crystal Beast Cobalt Eagle
 * Crystal Beast Emerald Tortoise → Advanced Crystal Beast Emerald Tortoise
 * Crystal Beast Ruby Carbuncle → Advanced Crystal Beast Ruby Carbuncle
 * Crystal Beast Sapphire Pegasus → Advanced Crystal Beast Sapphire Pegasus
 * Crystal Beast Topaz Tiger → Advanced Crystal Beast Topaz Tiger
 * Darkfire Soldier #1 → Darkfire Soldier #2
 * Dark Gray → Ancient One of the Deep Forest
 * Dark Witch → LaMoon
 * Dark Magician → Dark Magician (Arkana)
 * Disk Magician → Holograh
 * Dissolverock → The Thing That Hides in the Mud
 * Dorover → Liquid Beast
 * Droll Bird → Great Bill
 * Elemental HERO Bubbleman → Elemental HERO Neo Bubbleman
 * Elemental HERO Flame Wingman → Elemental HERO Phoenix Enforcer
 * Elemental HERO Shining Flare Wingman → Elemental HERO Shining Phoenix Enforcer
 * Elephant Statue of Blessing → Elephant Statue of Disaster
 * Enchanting Mermaid → Amazon of the Seas
 * Eternal Rest → Really Eternal Rest
 * Fairywitch → Witch's Apprentice
 * Fiend's Hand Mirror → Fairy's Hand Mirror
 * Fiend Reflection #1 → Fiend Reflection #2
 * Firegrass → Living Vase
 * Flame Viper → Serpent Marauder
 * Flying Kamakiri #1 → Flying Kamakiri #2
 * Gate Blocker → Gate Blocker 2
 * Gate Deeg → Ghoul with an Appetite
 * Gatekeeper → Royal Guard
 * Ghost Knight of Jackal → Mystical Knight of Jackal
 * Gilford the Lightning → Gilford the Legend
 * Great White → Man-Eating Black Shark
 * Green Phantom King → Queen of Autumn Leaves
 * Gyakutenno Megami → Empress Judge
 * Haniwa → Rock Spirit
 * Hard Armor → Headless Knight
 * Hard-sellin' Goblin → Hard-sellin' Zombie
 * Hibikime → Sonic Maid
 * Hiro's Shadow Scout → Meotoko
 * Hourglass of Courage → Hourglass of Life
 * Invader of the Throne → Protector of the Throne
 * Jinzo 7 → Jinzo
 * Jowgen the Spiritualist → Fossil Dyna Pachycephalo
 * Kaiser Sea Horse → Sea Serpent Warrior of Darkness
 * Key Mace → Key Mace #2
 * King Fog → LaLa Li-Oon → Violent Rain
 * Kunai with Chain → Blast with Chain
 * Kurama → Whiptail Crow
 * Kuriboh → Winged Kuriboh → Kuribon → Wretched Ghost of the Attic
 * Lava Battleguard → Swamp Battleguard
 * Level Limit - Area A → Level Limit - Area B
 * Little Chimera → Fusionist
 * Luster Dragon → Luster Dragon #2
 * M-Warrior #1 → M-Warrior #2
 * Man-Eating Plant → Darkworld Thorns
 * Mechanical Snail → Spiked Snail
 * Metalmorph → Rare Metalmorph
 * Mirror Force → Dark Mirror Force → Radiant Mirror Force
 * Mokey Mokey → Mokey Mokey King
 * Morphing Jar → Morphing Jar #2 → Ancient Jar
 * Mushroom Man → Mushroom Man #2
 * Mystery Hand → The Judgement Hand
 * Mystical Elf → Dark Elf
 * Mystical Sheep #1 → Mystical Sheep #2
 * Nekogal #1 → Nekogal #2
 * Nobleman of Crossout → Nobleman of Extermination
 * Obelisk the Tormentor (original) → Obelisk the Tormentor
 * Oscillo Hero → Wattkid
 * Penguin Soldier → Penguin Knight
 * Petit Angel → Shining Friendship
 * Polymerization → Polymerization (Fusion)
 * Pot of Greed → Pot of Avarice → Reckless Greed
 * Pot the Trick → Dragon Piper
 * Princess of Tsurugi → Queen's Double
 * Robbin' Goblin → Robbin' Zombie
 * Robolady → Roboyarou
 * Rock Ogre Grotto #1 → Steel Ogre Grotto #1 → Steel Ogre Grotto #2
 * Rock Ogre Grotto #2 → Stone Ogre Grotto
 * Root Water → High Tide Gyojin
 * Sasuke Samurai → Sasuke Samurai #2 → Sasuke Samurai #3 → Sasuke Samurai #4
 * Sage of Silence → Sage of Stillness
 * Skilled Dark Magician → Skilled White Magician
 * Skull Dice → Graceful Dice
 * Skull Knight → Skull Knight #2
 * Skull Servant → The Wandering Doomed
 * Slifer the Sky Dragon (original) → Slifer the Sky Dragon
 * Spirit of the Books → Crow Goblin
 * Succubus Knight → Vishwar Randi
 * Swords of Revealing Light → Swords of Concealing Light
 * The Furious Sea King → Night Lizard
 * The Winged Dragon of Ra (original) → The Winged Dragon of Ra
 * Thunder Kid → Electric Lizard
 * Trap Hole → Acid Trap Hole → Bottomless Trap Hole → Giant Trap Hole → Treacherous Trap Hole → D.D. Trap Hole → Gemini Trap Hole → Adhesion Trap Hole → Scrap-Iron Pitfall
 * Twin Long Rods #1 → Twin Long Rods #2
 * Two-Mouth Darkruler → Twin-Headed Thunder Dragon
 * Tyhone → Tyhone #2
 * Vampire Lord → Vampire's Curse
 * Weather Control → Weather Report
 * Wing Egg Elf → Winged Egg of New Life
 * Winged Dragon, Guardian of the Fortress #1 → Winged Dragon, Guardian of the Fortress #2
 * Yashinoki → Snakeyashia

Monster Cards

 * Adhesive Explosive → Blast Sphere
 * Achacha Archer → Chacchaka Archer
 * Airknight Parshath → Neo-Parshath, the Sky Paladin → Avenging Knight Parshath
 * Amazoness Trainee → Amazoness Chain Master
 * Amphibious Bugroth → Amphibious Bugroth MK-3
 * Andro Sphinx → Theinen the Great Sphinx
 * Arcanite Magician → Arcanite Magician/Assault Mode → Supreme Arcanite Magician
 * Aqua Madoor → Neo Aqua Madoor
 * Aussa the Earth Charmer → Familiar-Possessed - Aussa
 * Beastking of the Swamps → King of the Swamp
 * Beast King Barbaros → Beast Machine King Barbaros Ür
 * Beautiful Headhuntress → Axe Raider → X-Saber Anu Piranha
 * Big Core → B.E.S. Big Core MK-2
 * Blackland Fire Dragon → Koumori Dragon
 * Blue-Eyes White Dragon → Blue-Eyes Shining Dragon
 * Cannon Soldier → Cannon Soldier MK-2
 * Codarus → Levia-Dragon - Daedalus → Ocean Dragon Lord - Neo-Daedalus
 * Cosmic Horror Gangi'el → Cosmic Fortress Gol'gar
 * Crawling Dragon 2 → Two-Headed King Rex
 * Cyber Larva → Proto-Cyber Dragon → Cyber Dragon → Cyber Dragon Zwei → Cyber Twin Dragon → Cyber End Dragon → Chimeratech Fortress Dragon → Chimeratech Overdragon → Cyber Eltanin
 * Cyber Larva → Proto-Cyber Dragon → Cyber Dragon → Cyber Laser Dragon/Cyber Barrier Dragon


 * Cyber Ogre → Cyber Ogre 2
 * Cycroid → Pair Cycroid
 * Dark Assailant → Shadowslayer
 * Dark Magician Girl → Magi Magi ☆ Magician Gal
 * Dharc the Dark Charmer → Familiar-Possessed - Dharc
 * Elemental HERO Aqua Neos → Elemental HERO Marine Neos
 * Elemental HERO Bladedge → Evil HERO Malicious Edge
 * Elemental HERO Flame Wingman → Evil HERO Inferno Wing
 * Elemental HERO Flame Wingman → Elemental HERO Shining Flare Wingman
 * Elemental HERO Gaia → Evil HERO Dark Gaia
 * Elemental HERO Phoenix Enforcer → Elemental HERO Shining Phoenix Enforcer
 * Elemental HERO Rampart Blaster → Evil HERO Infernal Sniper
 * Elemental HERO Thunder Giant → Evil HERO Lightning Golem
 * Elemental HERO Wild Wingman → Evil HERO Wild Cyclone
 * Eria the Water Charmer → Familiar-Possessed - Eria → Raging Eria → Gishki Ariel
 * Exiled Force → Wandering Force
 * Feral Imp → Des Feral Imp
 * Flelf → Shining Elf
 * Flying Fish → Golden Flying Fish
 * Gaia the Fierce Knight → Swift Gaia the Fierce Knight → Gaia Knight, the Force of Earth → Gaia Drake, the Universal Force
 * Galaxy-Eyes Photon Dragon → Neo Galaxy-Eyes Photon Dragon
 * Gate Blocker → Gate Blocker 2
 * Gearfried the Iron Knight/Evocator Chevalier → Gearfried the Swordmaster → Phoenix Gearfried
 * Gem-Knight Lazuli → Gem-Knight Seraphi
 * Giltia the D. Knight → Gilti-Gearfried the Magical Steel Knight
 * Goblin Attack Force → Goblin Elite Attack Force
 * Hane-Hane → Hade-Hane
 * Hiita the Fire Charmer → Familiar-Possessed - Hiita
 * Infernalqueen Archfiend → Imprisoned Queen Archfiend
 * Injection Fairy Lily → Counselor Lily
 * Insect Princess → Insect Queen
 * Jinzo 7 → Jinzo - Returner → Jinzo → Jinzo - Lord
 * Junk Synchron/Junk Defender/Junk Forward → Junk Blader → Junk Warrior/Junk Collector → Junk Gardna → Junk Archer/Junk Berserker → Junk Destroyer
 * Larvas → Mon Larvas
 * Legacy Hunter → Don Zaloog
 * Winged Dragon, Guardian of the Fortress → Luster Dragon
 * Lyna the Light Charmer → Milla the Temporal Magician
 * Magical Exemplar → Tempest Magician
 * Mammoth Graveyard → Great Mammoth of Goldfine
 * Man-Eater Bug → Nobleman-Eater Bug
 * Memory Crusher → Memory Crush King
 * Mid Shield Gardna → Big Shield Gardna
 * Mist Valley Thunderbird → Mist Valley Apex Avian
 * Moja → King of the Beasts
 * Monk Fighter → Master Monk
 * Muka Muka → Enraged Muka Muka
 * Mystical Elf → Dark Elf
 * Neo-Spacian Aqua Dolphin → Neo-Spacian Marine Dolphin
 * Neo-Spacian Glow Moss → Neo-Spacian Twinkle Moss
 * Number 32: Shark Drake → Number C32: Marine Biting Dragon - Shark Drake Vice
 * Number 39: Utopia → Number C39: Utopia Ray
 * Power Tool Dragon → Life Stream Dragon
 * Red Dragon Archfiend → Red Dragon Archfiend/Assault Mode → Majestic Red Dragon → Red Nova Dragon
 * Robolady → Super Robolady
 * Roboyarou → Super Roboyarou
 * Senju of the Thousand Hands → Manju of the Ten Thousand Hands
 * Skull Servant → King of the Skull Servants
 * Snow Dragon → Snowdust Dragon
 * St. Joan → Sacred Knight Joan
 * Stardust Xiaolong → Debris Dragon → Stardust Dragon → Stardust Dragon/Assault Mode → Majestic Star Dragon → Shooting Star Dragon → Shooting Quasar Dragon/Cosmic Blazar Dragon
 * The Statue of Easter Island → Moai Interceptor Cannons → OOPArts Moai
 * The Unhappy Maiden → The Unhappy Girl
 * UFOroid → UFOroid Fighter
 * White Ninja → White Dragon Ninja
 * Wynn the Wind Charmer → Familiar-Possessed - Wynn → Storming Wynn → Winda, Priestess of Gusto

Spell Cards

 * Broken Bamboo Sword → Golden Bamboo Sword/Soul Devouring Bamboo Sword
 * Burning Spear → Salamandra
 * Elf's Light → Shine Palace
 * Fairy Meteor Crush → Big Bang Shot
 * Mooyan Curry → Blue Medicine → Red Medicine → Goblin's Secret Remedy → Dian Keto the Cure Master → Poison of the Old Man
 * Polymerization → Dark Fusion → Dark Calling
 * Polymerization → Miracle Fusion → Parallel World Fusion
 * Polymerization → Super Polymerization
 * Rush Recklessly → Super Rush Recklessly
 * Skyscraper → Skyscraper 2 - Hero City
 * Sparks → Hinotama → Final Flame → Ookazi → Tremendous Fire → Poison of the Old Man
 * Speed World → Speed World 2
 * Sword of Dark Destruction → Sword of Dark Rites
 * The Seal of Orichalcos → Orichalcos Deuteros → Orichalcos Tritos
 * Umi → A Legendary Ocean

Trap Cards

 * Dimension Wall → Magic Cylinder
 * Enchanted Javelin → Draining Shield
 * Negate Attack → Draining Shield/Magic Cylinder
 * Reckless Greed → Card of Sacrifice
 * Magic Jammer → Cursed Seal of the Forbidden Spell

Monster Cards

 * Black Luster Soldier - Envoy of the Beginning → Sky Scourge Enrise/Ruin, Queen of Oblivion
 * Chaos Emperor Dragon - Envoy of the End → Judgment Dragon → Sky Scourge Norleras/Demise, King of Armageddon
 * Chaos Sorcerer → Caius the Shadow Monarch
 * Dark Magician of Chaos → Endymion, the Master Magician

Spell Cards

 * Change of Heart → Brain Control → Mind Control
 * Creature Swap → Creature Seizure
 * Harpie's Feather Duster → Straight Flush
 * Heavy Storm → Giant Trunade → Storm
 * Monster Reborn → Monster Reincarnation
 * Mystical Space Typhoon → Mystical Wind Typhoon → Twister → Tornado
 * Pot of Greed → Jar of Greed → Shard of Greed
 * Raigeki → Lightning Vortex → Flash of the Forbidden Spell
 * Raigeki → Raigeki Break
 * Scapegoat → Stray Lambs
 * Shield Crush → Black-Winged Strafe

Trap Cards

 * Mirror Force → Dark Mirror Force → Radiant Mirror Force
 * Waboku → Hallowed Life Barrier
 * Horn of Heaven → Vanquishing Light
 * Solemn Judgement → Solemn Warning
 * Black Horn of Heaven → Swallow Flip

Transformed Cards

 * Airknight Parshath → Neo-Parshath, the Sky Paladin/Darknight Parshath/Avenging Knight Parshath
 * Ally of Justice Catastor → Evilswarm Golem
 * Amazoness Trainee → Amazoness Chain Master
 * Andro Sphinx → Theinen the Great Sphinx
 * Arcana Force EX - The Light Ruler → Arcana Force EX - The Dark Ruler
 * Armed Dragon LV7 → Dark Armed Dragon
 * Aussa the Earth Charmer → Familiar-Possessed - Aussa → Avalanching Aussa
 * Baby Dragon → Thousand Dragon
 * Battle Ox → Rabid Horseman
 * Beast King Barbaros → Beast Machine King Barbaros Ür
 * Brionac, Dragon of the Ice Barrier → Evilswarm Bahamut
 * Chaos Sorcerer → Lightray Sorcerer
 * Chrysalis Chicky → Neo-Spacian Air Hummingbird → Elemental HERO Air Neos
 * Chrysalis Dolphin → Neo-Spacian Aqua Dolphin → Elemental HERO Aqua Neos
 * Chrysalis Dolphin → Neo-Spacian Aqua Dolphin → Neo-Spacian Marine Dolphin → Elemental HERO Marine Neos
 * Chrysalis Larva → Neo-Spacian Flare Scarab → Elemental HERO Flare Neos
 * Chrysalis Mole → Neo-Spacian Grand Mole → Elemental HERO Grand Neos
 * Chrysalis Pantail → Neo-Spacian Dark Panther → Elemental HERO Dark Neos
 * Chrysalis Pinny → Neo-Spacian Glow Moss → Elemental HERO Glow Neos
 * Chrysalis Pinny → Neo-Spacian Glow Moss → Neo-Spacian Twinkle Moss
 * Codarus → Levia-Dragon - Daedalus → Lightray Daedalus
 * Codarus → Levia-Dragon - Daedalus → Ocean Dragon Lord - Neo-Daedalus
 * Combo Fighter → Combo Master
 * Crystal Beast Amber Mammoth → Advanced Crystal Beast Amber Mammoth
 * Crystal Beast Amethyst Cat → Advanced Crystal Beast Amethyst Cat
 * Crystal Beast Cobalt Eagle → Advanced Crystal Beast Cobalt Eagle
 * Crystal Beast Emerald Tortoise → Advanced Crystal Beast Emerald Tortoise
 * Crystal Beast Ruby Carbuncle → Advanced Crystal Beast Ruby Carbuncle
 * Crystal Beast Sapphire Pegasus → Advanced Crystal Beast Sapphire Pegasus
 * Crystal Beast Topaz Tiger → Advanced Crystal Beast Topaz Tiger
 * Cycroid → Pair Cycroid
 * Dark Magician → Dark Sage/Dark Eradicator Warlock/Dark Magician Knight
 * Dharc the Dark Charmer → Familiar-Possessed - Dharc
 * Diabolos, King of the Abyss → Lightray Diabolos
 * Dragunity Aklys → Evilswarm Zahhak
 * Dunames Dark Witch → Dark Valkyria
 * Elemental HERO Bubbleman → Elemental HERO Neo Bubbleman
 * Elemental HERO Clayman → Elemental HERO Clay Guardian
 * Elemental HERO Flame Wingman → Elemental HERO Shining Flare Wingman
 * Elemental HERO Gaia → Evil HERO Dark Gaia
 * Elemental HERO Knospe → Elemental HERO Poison Rose
 * Elemental HERO Neos Alius → Elemental HERO Neos
 * Elemental HERO Neos → Elemental HERO Air Neos/Elemental HERO Aqua Neos/Elemental HERO Chaos Neos/Elemental HERO Dark Neos/Elemental HERO Divine Neos/Elemental HERO Flare Neos/Elemental HERO Glow Neos/Elemental HERO Grand Neos/Elemental HERO Magma Neos/Elemental HERO Marine Neos/Elemental HERO Storm Neos/Elemental HERO Neos Knight/Neos Wiseman/Rainbow Neos
 * Elemental HERO Phoenix Enforcer → Elemental HERO Shining Phoenix Enforcer
 * Enishi, Shien's Chancellor → Legendary Six Samurai - Enishi
 * Eria the Water Charmer → Familiar-Possessed - Eria
 * Eria the Water Charmer → Raging Eria → Gishki Ariel
 * Fabled Ragin → Evilswarm Thanatos
 * Field-Commander Rahz → Dark Crusader
 * Freed the Brave Wanderer → Freed the Matchless General → Dark General Freed
 * Gearfried the Iron Knight → Gearfried the Swordmaster → Phoenix Gearfried → Lightray Gearfried
 * Gem-Knight Emerald → Evilswarm Heliotrope
 * Giant Orc → Tardy Orc
 * Gigobyte → Gagagigo → Giga Gagagigo → Gogiga Gagagigo
 * Giltia the D. Knight → Gilti-Gearfried the Magical Steel Knight
 * Gishki Shadow → Evilswarm Ketos
 * Green Baboon, Defender of the Forest → Yellow Baboon, Archer of the Forest → Ancient Crimson Ape
 * Gungnir, Dragon of the Ice Barrier → Evilswarm Ophion
 * Gusto Falco → Evilswarm Frais
 * Hand of Nephthys → Sacred Phoenix of Nephthys → Dark Nephthys
 * Harpie Girl → Harpie Lady → Cyber Harpie Lady
 * Harpie's Pet Baby Dragon → Harpie's Pet Dragon
 * Helios - The Primordial Sun → Helios Duo Megistus → Helios Trice Megistus
 * Hiita the Fire Charmer → Familiar-Possessed - Hiita → Blazing Hiita
 * Horus the Black Flame Dragon LV8 → Dark Horus
 * Infernalqueen Archfiend → Imprisoned Queen Archfiend
 * Inpachi → Blazing Inpachi → Charcoal Inpachi → Woodborg Inpachi
 * Insect Princess → Insect Queen
 * Jinzo - Returner → Jinzo → Jinzo - Lord
 * Jurrac Titano → Evilswarm Salamandra
 * Lady of Faith → Dryad → Elemental Mistress Doriado → Shadowpriestess of Ohm
 * Laval Cannon → Evilswarm Olanta
 * Locomotion R-Genex → Evilswarm Coppélial
 * Kattapillar → Cocoon of Evolution → Larva of Moth → Pupa of Moth
 * Kuriboh → Winged Kuriboh → Winged Kuriboh LV9/Winged Kuriboh LV10
 * Machine King - 3000 B.C. → Machine King Prototype → Machine King → Perfect Machine King
 * Magician's Valkyria → Dark Magician Girl
 * Mist Valley Thunderbird → Mist Valley Apex Avian → Evilswarm Thunderbird
 * Mokey Mokey → Mokey Mokey King
 * Monk Fighter → Master Monk
 * Mystical Elf → Dark Elf
 * Naturia Cosmobeet → Evilswarm Mandrago
 * Neo Flamvell Origin → Evilswarm-o'-Wisp
 * Number 32: Shark Drake → Number C32: Marine Biting Dragon - Shark Drake Vice
 * Number 39: Utopia → Number C39: Utopia Ray
 * Outstanding Dog Marron → Mad Dog of Darkness → Skull Dog Marron → Mecha-Dog Marron
 * Petit Moth → Cocoon of Evolution → Larvae Moth/Great Moth/Perfectly Ultimate Great Moth
 * Power Tool Dragon → Life Stream Dragon
 * Psychic Kappa → Kappa Avenger → Hyosube
 * Rainbow Dragon → Rainbow Dark Dragon
 * Rainbow Dragon/Rainbow Dark Dragon → Rainbow Neos
 * Red Dragon Archfiend → Majestic Red Dragon/Red Nova Dragon
 * Red-Eyes Black Chick → Red-Eyes Wyvern → Red-Eyes Black Dragon → Red-Eyes Darkness Dragon → Red-Eyes Darkness Metal Dragon
 * Relinquished → Thousand-Eyes Restrict
 * Robolady → Super Robolady
 * Roboyarou → Super Roboyarou
 * Ryu-Kishin Clown → Ryu-Kishin → Ryu-Kishin Powered
 * Sacred Pollux → Evilswarm Castor
 * Second Goblin → Coach Goblin → D.D. Trainer
 * Simorgh, Bird of Divinity → Simorgh, Bird of Ancestry → Dark Simorgh
 * Skull Flame → Supersonic Skull Flame
 * Skull Servant → King of the Skull Servants
 * Small Piece Golem → Medium Piece Golem → Big Piece Golem → Multiple Piece Golem
 * St. Joan → Guardian Angel Joan/Sacred Knight Joan
 * Sonic Chick → Sonic Duck
 * Stardust Dragon → Majestic Star Dragon/Shooting Star Dragon
 * Summoned Skull → Skull Archfiend of Lightning
 * Tenkabito Shien → Legendary Six Samurai - Shi En → Great Shogun Shien
 * The Claw of Hermos → Legendary Knight Hermos
 * The Creator Incarnate → The Creator → The Dark Creator
 * The Eye of Timaeus → Legendary Knight Timaeus
 * The Fang of Critias → Doom Virus Dragon/Mirror Force Dragon/Tyrant Burst Dragon/Legendary Knight Critias
 * The Masked Beast → Masked Beast Des Gardius
 * The Winged Dragon of Ra (Sphere Mode) → The Winged Dragon of Ra (original) → The Winged Dragon of Ra (Phoenix Mode)
 * The White Stone of Legend → Paladin of White Dragon → Blue-Eyes White Dragon
 * Thought Ruler Archfiend → Mental Over Archfiend/Ultimate Axon Kicker
 * Thousand Needles → Two Thousand Needles → Three Thousand Needles
 * Thunder Dragon → Twin-Headed Thunder Dragon
 * Transforming Sphere → The Atmosphere
 * Tribe-Infecting Virus → Tribe-Shocking Virus
 * Trishula, Dragon of the Ice Barrier → Evilswarm Ouroboros
 * Twinbarrel Dragon → Blowback Dragon → Barrel Dragon → Gatling Dragon
 * UFOroid → UFOroid Fighter
 * Ushi Oni → Giant Ushi Oni
 * Vampire Lord → Vampire Genesis
 * Voltanis the Adjudicator → Dark Voltanis
 * Warrior Dai Grepher → Dark Grepher
 * Warrior Dai Grepher → Dark Lucius LV4 → Dark Lucius LV6 → Dark Lucius LV8
 * Warrior Dai Grepher → Lightray Grepher
 * Warrior Lady of the Wasteland → D.D. Warrior Lady
 * Warrior of Zera → Zeradias, Herald of Heaven → Archlord Zerato → Darklord Zerato → Mazera DeVille → Zera the Mant
 * Worm Zero → Evilswarm Azathoth
 * Wynn the Wind Charmer → Familiar-Possessed - Wynn → Storming Wynn → Winda, Priestess of Gusto
 * XX-Saber Boggart Knight → Evilswarm Nightmare
 * Yubel → Neos Wiseman
 * Yubel → Yubel - Terror Incarnate → Yubel - The Ultimate Nightmare

LV

 * Allure Queen LV3 → Allure Queen LV5 → Allure Queen LV7
 * Armed Dragon LV3 → Armed Dragon LV5 → Armed Dragon LV7 → Armed Dragon LV10
 * Dark Lucius LV4 → Dark Lucius LV6 → Dark Lucius LV8
 * Dark Mimic LV1 → Dark Mimic LV3
 * Horus the Black Flame Dragon LV4 → Horus the Black Flame Dragon LV6 → Horus the Black Flame Dragon LV8
 * Masked Knight LV3 → Masked Knight LV5 → Masked Knight LV7
 * Mystic Swordsman LV2 → Mystic Swordsman LV4 → Mystic Swordsman LV6
 * Silent Magician LV4 → Silent Magician LV8
 * Silent Swordsman LV3 → Silent Swordsman LV5 → Silent Swordsman LV7
 * Ultimate Insect LV1 → Ultimate Insect LV3 → Ultimate Insect LV5 → Ultimate Insect LV7
 * Winged Kuriboh → Winged Kuriboh LV9
 * Winged Kuriboh → Winged Kuriboh LV10

Metalmorph

 * Jirai Gumo → Launcher Spider
 * Musician King → Heavy Metal King
 * Red-Eyes Black Dragon → Red-Eyes Black Metal Dragon
 * Red-Eyes Black Dragon → Red-Eyes Darkness Dragon → Red-Eyes Darkness Metal Dragon
 * Zoa → Metalzoa

Toon monsters

 * Blue-Eyes White Dragon → Blue-Eyes Toon Dragon
 * Cannon Soldier → Toon Cannon Soldier
 * Dark Magician Girl → Toon Dark Magician Girl
 * Gemini Elf → Toon Gemini Elf
 * Goblin Attack Force → Toon Goblin Attack Force
 * Masked Sorcerer → Toon Masked Sorcerer
 * Red Archery Girl → Toon Mermaid
 * Ryu-Ran → Manga Ryu-Ran
 * Summoned Skull → Toon Summoned Skull

Zombie

 * 3-Hump Lacooda → Des Lacooda
 * Chthonian Emperor Dragon → Doomkaiser Dragon
 * Crass Clown → Clown Zombie
 * Crawling Dragon → Dragon Zombie
 * Dark Ruler Ha Des → Revived King Ha Des
 * Majestic Mech - Ohka → Malevolent Mech - Goku En
 * Paladin of White Dragon → Paladin of the Cursed Dragon
 * Red-Eyes Darkness Dragon → Red-Eyes Zombie Dragon
 * Zanki → Armored Zombie
 * Skull Archfiend of Lightning/Summoned Skull → Archfiend Zombie-Skull

Assault Modes

 * Arcanite Magician → Arcanite Magician/Assault Mode
 * Colossal Fighter → Colossal Fighter/Assault Mode
 * Doomkaiser Dragon → Doomkaiser Dragon/Assault Mode
 * Hyper Psychic Blaster → Hyper Psychic Blaster/Assault Mode
 * Red Dragon Archfiend → Red Dragon Archfiend/Assault Mode
 * Stardust Dragon → Stardust Dragon/Assault Mode

Majestic

 * Red Dragon Archfiend → Majestic Red Dragon
 * Stardust Dragon → Majestic Star Dragon

Malefic

 * Blue-Eyes White Dragon → Malefic Blue-Eyes White Dragon
 * Cyber End Dragon → Malefic Cyber End Dragon
 * Rainbow Dragon → Malefic Rainbow Dragon
 * Red-Eyes B. Dragon → Malefic Red-Eyes Black Dragon
 * Stardust Dragon → Malefic Stardust Dragon

Cosmic Synchro Monsters

 * Red Dragon Archfiend → Red Nova Dragon
 * Stardust Dragon → Shooting Star Dragon → Cosmic Blazar Dragon/Shooting Quasar Dragon

Chaos Xyz Evolutions

 * Number 32: Shark Drake → Number C32: Marine Biting Dragon - Shark Drake Vice
 * Number 39: Utopia → Number C39: Utopia Ray