Fusion Dance / Video Games

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• Several crossover games have merged bosses made of up of two characters from the respective franchises being featured:
  • Mortal Kombat vs. DC Universe has Dark Kahn, a combination of Shao Kahn from Mortal Kombat and Darkseid from DC. It happened as a result of Superman blasting Darkseid with his Eye Beams, when the villain was stepping through a Boom Tube, at the same moment as Raiden was blasting Shao Kahn entering a portal with his lightning.
  • Capcom vs. SNK 2: Mark of the Millennium has a variant. Just before the final boss fight, players are treated to a cut scene where Akuma from Street Fighter faces off against Rugal Bernstein from The King of Fighters. If Rugal wins, he absorbs Akuma's Satsui no Hado and becomes God Rugal, and if Akuma wins, he absorbs Rugal's Orochi power and becomes Shin Akuma.
  • In Marvel vs. Capcom: Infinite, Ultron and Sigma use the Infinity Gems to become Ultron-Sigma.
• Armies of Exigo: By combining a Goblin Hunter with a cow-like Boron they now become a new unit called the Goblin Rider. The goblin will be riding the Boron causing the Goblin Hunter's maximum health to dramatically improve at the price of the stubborn beast being significantly slower.
• Astra Hunter Zosma: In the ending, the blob companion becomes a part of Zosma's soul and can no longer exist as an individual. This is subverted if the player obtains all the treasure in the game, allowing the companion to physically manifest and go on adventures with Zosma again.
• The Binding of Isaac: From Afterbirth onward, having Bum Friend, Dark Bum, and Key Bum all together will play a cutscene where the three of them fly together and fuse to create Super Bum. Super Bum has traits of all three component items — he grabs coins, hearts, and keys — but he will pay out double the usual rewards of the originals. Visually, Super Bum looks like a larger Bum Friend with a mask and cape, so this appears to be a Power Booster-type fusion, unless the mask and cape are "made up from" the other two Bums (they're about the same color). The fourth "bum" item, Bumbo, has no effect on the transformation and does not fuse with anybody.
• Blue Dragon has Ultimate Szabo, which is all five Demon King Robots at once.
• Several occurrences of this appear in the Breath of Fire series:
  • The first game has Karn, whose only "power" is his ability to fuse with other party members to create powerful fused forms. The power is entirely missable, which can make Karn entirely useless. He gets a form which can only be used underwater after the only underwater section in the game has finished.
  • Ryu's Infinity Plus One Dragon in the first game also allows him to absorb all his partners to form one giant dragon with physical features from all of them. It always does maximum damage with every attack, making most bosses a breeze.
  • The two bosses Balio and Sunder from Breath of Fire III perform their own fusion to fight the protagonists. Ironically, it's the only defeatable form; all but one of its attacks are toned down versions of attacks the two had separately, and it can only perform one attack per turn versus two for the two separately. Ouch. Its appearance is also a major Shout-Out to Ultraman, complete with an energy beam performed with the distinctive L arm pose.
    • There's also a Miracle gene and Tiamat form in BoF3, which allows replaces the party with one gigantic dragon. (The Fusion gene might seem like an example, but Ryu never absorbs other party members when using it; he just copies their attributes.)
  • In Breath of Fire II, powering up your teammates takes the form of fusing them with different elemental Shamans. This can have minor effects (turning Sten's fur red) to major effects (changing the nigh-Joke Character Jean into one of the game's most powerful characters).
• Capella's Promise has the Mother superweapon, whose sole purpose is to combine people and monsters into monstrous soldiers known as Hutes. Worse yet, she can fuse Hutes into even stronger Hutes. The Big Bad of the story, Zanara, ends up fusing with her to create an intelligent but insane war machine.
• Fusion is a major mechanic of Cassette Beasts. In battle, the player character can fuse with a party member (assuming fusion with that party member has been unlocked). Because gameplay is based on transforming into monsters to fight, this fusion results in a much more powerful monster that combines the traits of the two monsters in the fusion.
• COGEN: Sword of Rewind: Late in the game, Kohaku and Akasha temporarily fuse, as a final power-up to fight Yuji, possessed by ExeBreaker. The fusion acts as a power booster, leaving one of them in control, and doesn't bring any physical changes, save for a Palette Swapped outfit. The fusion is named "Saphed Sher" ("While Lion" in Hindi), which is displayed in the user's dialogue box.
• Coryoon have it's Final Boss, which begins as a Mirror Match as you battle three silver clones of your titular character. Defeat them and they combine themselves into becoming a giant clone for a rematch.
• Masa and Mune in Chrono Trigger fuse after getting their individual butts kicked while testing potentials to wield the Masamune. The result is pretty... chubby, for some reason.
  • Obviously, their fingertips were misaligned.
    • Makes you wonder how powerful they'd be if they got the fusion dance right.
  • Dream, or Doreen, merges with them in Chrono Cross. They all inhabit the "Grand Dream," or Mastermune.
  • The Time Devourer of Chrono Cross is a Composite fusion of Lavos and Schala, whose disapproval at the notion of Might Makes Right Evolutionary theory has her tell the entire space-time continuum/multiverse that it had better find some other way of defeating Lavos, or she'll erase everything. Granted, she's affected by Lavos' destructive intent.
    • We also see Harle, the Seventh Dragon, doing the Fusion Dance with the other six dragons.
• Though it contains more than 2 beings, Crash Bandicoot: The Huge Adventure gives us Megamix, a composite form of all the game's bosses which you must run away from in a "true" final level (while avoiding a freighter's worth of Nitro Crates, to boot). This ending can be unlocked if the player has gathered all the gems and relics in addition to the Crystals, naturally. Megamix later returned in Crash Team Racing Nitro-Fueled.
• In Cuphead, the two Bash Brothers, Ribby and Croaks, perform their dance during the final phase of their fight, where one swallows the other and they turn into a huge slot machine.
• The obscure 1989 Namco shmup Dangerous Seed has an example in the last three bosses before the final stage. Allowing the st. 5 or st. 6 bosses to escape leads you to a different planetary orbit, with a boss consisting of a mashup of the boss who escaped and the boss who you'd normally fight there. What makes this really interesting is that if you allow Multi-Squid (st. 5) to escape, then let its fusion with Shark-Mouth, Monster-Head, escape the next boss fight, the new seventh boss, Ultimate-Tiger, is a Monster-Head/Twin-Claw fusion. In other words, it's three bosses fused together. Have fun!
• At the end of Darkstalkers 3, Lilith fuses with Morrigan as a Power Booster. Lilith was originally part of Morrigan, split off precisely because their combined form was strong enough to threaten dimensions and the established order. Due to the time they spent apart, they still got more powerful, by being able to split in order to do two-pronged attacks.
• In the Diablo series, the Seven Great Evils that rule Hell were once part of a singular Prime Evil by the name of Tathamet. In Diablo III, the Seven Great Evils are once again joined together by means of the Black Soulstone and Adria's betrayal of her own daughter Leah, who she had with Diablo by way of Aidan, the Dark Wanderer, resulting in Diablo being reborn as the second Prime Evil, the sum total of all Seven Great Evils in one being.
• In all the Disgaea games, monster-type enemies can be merged by throwing them together — effectively a Power Booster, in that the fused being is the highest-leveled component monster with a boost in levels equal to the level of the weaker monster.
  • Disgaea 3 also had the Magichange ability, which enables a monster to temporarily transform into a weapon for a human character, which enters into this trope mainly for those that turn into Fist-type weapons. (In all cases, the Magichanged monster provides both its main ability, and a percentage of its stats, to the wielder—but for most non-Fist versions, it more closely resembles an Empathic Weapon.)
  • Expanded on in Disgaea 4, where a monster can do a Fusion Dance with another one to supersize it, giving it increased stats across the board, and an increased range/radius on its attacks, among other things. It can still magichange in this state, as well, which gives a humanoid a ridiculously huge weapon that increases the range and radius of all their skills, on top of the usual magichange benefits.
• In Dragon Age non-demonic spirits who possess a mortal seem to be Switcher/incomplete Composite types. They're always present in mind, and their personalities do influence the other, but the spirit can also take over. In Wynne's case, the spirit of Faith only takes over briefly to protect her with healing and buffs. Anders is a gifted healer who switches mode to deal the more powerful offensive magic that only Vengeance is capable of. Sometimes Vengeance appears to seize control against Anders' will.
• Dragon Quest:
  • Some Slimes can band together to form a King Slime. You can tell right away that they're different from garden-variety Slimes because they take slightly more damage than normal, and they always call for help.
  • In Dragon Quest Monsters, you breed Mons together, the results of which are frequently a Fusion — especially when dealing with the Slime. For example, breeding a Slime (looks like a blue Hershey's kiss) and a Golem (looks like a man made out of bricks) gets you a Rockslime, which looks like a Hershey's kiss made out of bricks. Later localizations Enforced this trope by renaming this mechanic to synthesis, possibly because they wanted to avoid people thinking about the details on just how the copulation happens.
• In Book Four of Dreamfall Chapters, the First Dreamer merges with Zoë, making her the Barrier Maiden.
• Dyztopia: Post-Human RPG:
  • The party can gain the favor of Zodiac Archdemons and sync with them to use their abilities. Unfortunately, many antagonists are also capable of syncing with Zodiacs. The leader of the Zodiacs, Ophiuchus, can sync the rest of them on-demand and deny the party the ability to sync, though Virgo's status as an angel means she can maintain her sync with Rosie.
  • The Bone Elder is a fusion of several Smogs, though their consciousnesses have yet to fully fuse and they often bicker among themselves.
  • The new Superboss of the February 2024 update, Detritus Seven, is synced with the leader of the archangels, Slash.
• Elohim Eternal: The Babel Code: The Cainite sages, Og and Sihon, had to join their bodies in order to survive their wounds from the war. As a result, one of their heads is on their chest.
• In Eternal Fighter Zero, Mai Kawasumi and her ghost partner (Also called Mai) can do a Power Booster version for their Final Memory, called "Awakening": The ghost partner merges with Mai, who gets a boost in offense and speed for several seconds, giving her access to more combos and other powerful moves.
• Eternal Twilight has the Blood Council members fuse into a giant red monster known as the Bloody Abomination, which uses similar debuffing mechanics as the original components.
• In the Fallout series, creatures called Centaurs are made by putting more than one creature into a vat of the Forced Evolutionary Virus. The results are not pretty.
• Final Fantasy series:
  • One minor boss in Final Fantasy IV are the Calca and Brina dolls, which come in sets of three each. If enough time passes, and there's at least one of each alive, they will merge into the gigantic Calcabrina, and eventually unfuse again into two whole sets of six.
  • The Final Boss of Final Fantasy VIII, Ultimecia fuses with her Guardian Force Griever for the third stage of the fight, a composite that has her body sticking out of Griever's, thus mixing her magic with its strength.
  • Zorn and Thorn in Final Fantasy IX merge into the monstruous composite Meltigemini, although this was in fact their original form before they split.
  • Superboss Penance from Final Fantasy X is apparently the result of the defeated Dark Aeons merging into one, judging from the converging pyreflies that give rise to it.
  • Venat in Final Fantasy XII merges with Vayne as a Power Booster. He proceeds to absorb parts of the Flying Fortress Ragnarok into himself to become a monstruous cyborg called The Undying.
  • In Final Fantasy XIV Shadowbringers', specifically during the final battle against Emet-Selch, the Warrior is on the verge of succumbing to the Flood of Light inside them and transforming into a Lightwarden. But Ardbert offers them his axe, remerging his soul with theirs with the power of the Echo to bring them closer to their original self, Azem. Their newly merged soul is able to contain the Flood of Light and then weaponize it to take down Emet-Selch for good.
  • The Final Boss of Final Fantasy Crystal Chronicles Raem forcefully absorbs Mio to turn into Memiroa.
  • Flans in Final Fantasy: The 4 Heroes of Light can merge with each other to heal fully and add their stats. This can be frustrating if it happens with a rare Metal Flan. Also, the Seamstress crown can make two characters act as one by sewing them together.
• Fire Emblem Engage features so-called "Emblems", spectral copies of previous lords in the series, who are bound to Rings of Power, and usually fight alongside the wearer of the ring. They can also use the "Engage Mode", in which the Emblem gives their user a set of clothes inspired by the Emblem in question, energy wings, different hair color, and makes them float. The benefits include a powerful passive skill, new weapon with unique properties, and the ability to use a powerful attack or support skill once per Engage Mode.
• In Freedom Force, a blind female witness and an idealistic rookie cop get hit by Energy X and merge into a switchable superhero named Law and Order. The witness becomes Law, who is appropriately blind, and is armed with a sword. The cop becomes Order and is armed with a massive gavel. Only one can exist at any given time.
• Every Golden Sun game ends with one of these as the final boss.
  • The Fusion Dragon is a fusion of Saturos and Menardi.
  • The Doom Dragon uses Felix's parents and Isaac's dad. The player character shows remarkably little grief over it... Must be a Heroic Mime thing.
  • The Chaos Chimera uses Blados, Chalis, and the Chaos Hound as its components. Tear Jerker ensues as the latter turns out to be Volechek, and forcibly fights his sister and her companions again.
• The Great Gaias: The Singularity spell, invented by Khargynoth, can force someone to fuse with the caster, giving the caster the target's memories and abilities. However, the target must be weaker for the spell to work, or the target will either resist the fusion or take over the caster.
• Similar to the StarCraft example, the Viron units in Ground Control II are able to merge into other units, although the new units are not necessarily more powerful. Unlike StarCraft, this process is reversible, making Virons pretty versatile.
• In Grow ver.3, a character made of metal cubes will merge with a similar character made of purple balls when they meet.
• For most of Illusion of Gaia, Will is a Switcher: he lives the normal life, but he can take the form of the Dark Knight Freedan or the Light Knight Shadow (don't ask) when he explores dungeons. At the very end of the game, however, he performs a Composite fusion with Kara, another fully evolved human and the new Light Knight, to become a super-powered version of Shadow, complete with a new "Firebird" attack.
• The gameplay of Illusions (1984) involves merging and splitting amoeba-like creatures called Gleebs.
• Inscryption:
  • The Mycologist specializes in this, though he accomplishes it primarily with a hacksaw.
    • In Act 1, he'll merge duplicates of the same card, combining their stats and sigils; he can repeat this on already fused cards with other duplicates.
    • In Act 2, he's limited to specific cards, but the fused card gains doubled sigil power in addition to merged stats.
    • In Act 3, he appears as a secret boss whose main gimmick is fusing his cards on the playing field. When you beat him, he'll fuse all of your played cards into a powerful, low cost Mycobot.
  • Leshy has this as a gimmick in his game, ranging from the sacrifice stones which fuse the sigil of one card into another to the death cards he creates by taking stats, sigils, and cost from three separate cards.
• In Pocky & Rocky 2, Pocky can use Magic to fuse with her partners as a Power Booster (though there are a couple she just rides instead).
• Kingdom Hearts:
  • In Kingdom Hearts II, Sora can use his party members as Power Boosters using the Drive System. For example, Sora's Dual Wielding Valor Form involves absorbing Goofy. Absorbing Donald turns him into the magic-oriented Wisdom Form. Absorbing both active party members can turn him into Master or, later on, Final Form.
  • In Dream Drop Distance, Riku can use Dream Eaters as a Power Booster and enter various "Link Styles". The fact that Riku can do this and Sora can't is Foreshadowing that Riku is a Dream Eater in this game.
• Kirby:
  • Kirby: Triple Deluxe: After being defeated by Kirby the first time, [[Narcissist Queen Sectonia reveals her true plan to choke the life out of all of Planet Popstar and turn it into what she believes is "true beauty". To do so, she merges with the Dreamstalk and becomes a Planimal who prepares to defeat Kirby so he doesn't interfere with her plans.
  • Kirby: Planet Robobot: Twice. When Meta Knight returns aboard his repaired Halberd to help Kirby combat Star Dream after it goes haywire, Kirby uses his final Robobot Armor to scan the Halberd and combine with it to make the Halberd mode to help give it a fighting chance. Then, Star Dream combines with the entire Access Ark after its first phase.
  • Kirby and the Forgotten Land: Elfilin and Fecto Forgo do this (with the former doing this against his own will) to transform into Fecto Elfilis.
• Near the end of Legacy of Kain: Defiance, Kain and Raziel do the Power Boost version.
• The Legend of Zelda:
  • In The Legend of Zelda: Ocarina of Time, the Twinrova witches merge into a composite form for the second half of their Boss Battle.
  • The Legend of Zelda: A Link Between Worlds the final boss is a fusion of Ganon and Yuga. While the resulting fusion has aspects of Composite, Ganon is actually a Power Booster for Yuga. During the boss battle, Yuga forcibly turns Princess Hilda into another Power Booster since she had stolen the Triforce of Wisdom from Zelda.
• Done unwillingly by Robin, Frodo, and Metalbeard in LEGO Dimensions to form The Tri.
• In Little Fighter 2, Firen and Freeze can merge into the super-powered Firzen, but only one player gets to control him, so the other has to sit out until they decombine.
• In Lunar Knights, Lucian and Aaron can merge with the dark and light terrenials, respectively, to enter a more powerful form, although it has a fairly short duration.
• Marathon gives us an example with two non-physical characters. Near the end of Infinity, the player character merges his AI With An Internet Connection Durandal with the ancient alien AI Thoth. The resulting character is a Composite of the two, although thankfully he doesn't seem to possess some of the traits of Durandal or Thoth.
• Happens a lot in Mario RPGs. A lot of those also contain Demonic Possession, but the fusing aspect is still there. Often they're final bosses:
  • Both Paper Mario: The Thousand-Year Door and Paper Mario: Sticker Star have Boos joining themselves together to form a bigger, meaner Atomic/Big Boo.
    • The final boss' first form from The Thousand-Year Door is a fusion between Princess Peach and the Shadow Queen.
    • Do not forget the Smorgs.
  • The final boss of Super Paper Mario is a fusion between Dimentio and Luigi, having features from both characters and powered by the Chaos Heart.
  • Mario & Luigi: Superstar Saga has Cackletta taking over Bowser's body after being defeated midway through the game, turning into Bowletta, which is Bowser's body showcasing some of Cackletta's features (including boobs).
  • In Mario & Luigi: Dream Team, when battling in the Dream World, Mario and Dreamy Luigi perform the Power Booster version of this, with Dreamy Luigi becoming a green aura that powers Mario up.
  • Mario & Luigi: Paper Jam, the final boss is a fusion of both Bowser and Paper Bowser called Shiny RoboBowser. Technically speaking, Paper Bowser fuses with a large number of his Mooks to become a giant suit of cardboard armor that the enlarged Bowser wears.
• In the Mega Man (Classic) series, Mega Man and Bass can perform a Power Booster fusion with their respective canine companions (far more often for Bass, Mega Man only did it in 6 and 7).
  • Soul Unison (DoubleSoul) in Mega Man Battle Network. It allows MegaMan.EXE to (Composite) fuse with other Navis and gain some of their abilities.
  • A special type of fusion occurs at the end of Battle Network 3 when Lan digitizes himself and merges with Mega Man to boost their response time. This eventually allows synchronization in subsequent games: when MegaMan.EXE scores a counter hit or is performing well, he becomes more powerful as a result of being "in sync" with Lan. But when he performs badly, he becomes more vulnerable as a result of being "out of sync".
    • Taken further in Battle Network 6, where MegaMan can use "Beast Out" to (Composite) fuse with the Cyber Beast he has sealed inside of him, which also has a touch of Two in One Body as if MegaMan is mentally exhausted, he can make one last pull, but temporarily loses himself to the Beast's power, and afterwards is left fatally weakened, or take the characteristics of an allied Navi (another composite), or reap the benefits of being "In Sync" with Lan (see above). And yes, you can have two of these at once; sadly, you can't be in "FullSync" and in a "Cross" (the Navi fusion) at the same time, making MegaMan absurdly powerful with the right combination of chips and programs.
  • In Mega Man Star Force, the hero(es) use(s) a combo composite/switcher. Geo lives his life normally until the baddies attack, and then he turns into the "Mega Man" of the series, which involves fusing him with energy being alien Omega-Xis.
    • He can also take the powers of other Energy Beings to gain additional powers. It's even possible to have what could be considered a four-way fusion in the third game.
  • Mega Man X had a few characters who could join together as Composites; for example, Bit and Byte of X3, who become Godkarmamachine O Inary.
  • Mega Man ZX has Biometals (Livemetals in the Japanese version), which contain the souls of characters from Mega Man Zero and X. The Biometals act as a Power Booster for humans and Reploids, turning them into "Mega Men" and granting them armored forms and abilities.
    • This Power Boosting system also has a Composite function; once the player finds both the Model X and Model Z Biometals, they can fuse with both at the same time to become Model ZX in what's called Double Megamerging. The titular transformation is only one of the six Double Megamerges (out of seven forms). (In the sequel, the player only has a single Biometal — Model A — that can copy the forms of other characters and Biometals without actually fusing with them).
• The main premise of the old NES game Monster Party was that Mark, a kid with a baseball bat, and Bert, a flying gargoyle dragon thing, fused together to fight monsters in the Bert's home, the Dark World. Most of the game is played as Mark, who only transforms to Bert when he scoffs down pills that are just lying around. It is a mystery why Bert needed Mark, since the Bert form is entirely superior.
• Mortal Kombat 11: Fire God Liu Kang comes into existence as a result of the fusion between the souls of Raiden, Revenant!Liu Kang and Past!Liu Kang. It's predominantly type B - Power Booster. Fire God Liu Kang has his physical appearance and fire powers, Raiden's lightning powers and his Revenant's knowledge.
• Kinky of Pac-Man Arrangement has the Power Booster form of this ability; being able to merge with any of the four standard ghosts and cause them to double in size and gain a special ability. They're also worth double the points when you eat them.
• Pathfinder: Kingmaker has the DLC character Kaessi, who is revealed to be a Switcher — twins "blessed" by the two-faced god Nethys to share a single body. At first their switching happens arbitrarily, but their recruitment quest gives them the ability to switch at will. They also happen to be complete opposites: one is Lawful Evil with fire powers, while the other is Chaotic Good specializing in water and ice.
• In Pinball Quest, the main enemies of the first table are a set of animated skeletons who combine to form a giant skeleton.
• Pokémon:
  • From Pokémon Black 2 and White 2 onwards, Kyurem can become Black Kyurem by merging with Zekrom, and become White Kyurem by merging with Zekrom's other half, Reshiram. It can do this due to being a byproduct of Zekrom and Reshiram splitting from their original form (i.e., the original dragon split into Zekrom and Reshiram, and Kyurem is the 'husk' that was left behind). The DNA Splicers let the player do this (and reverse the process) at any time, so long as both are in their party.
  • Zygarde is made up of several Zygarde Cores and many more Zygarde Cells. While it remains in its 50% Forme, it's able to merge with all its components in dire situations to achieve its Complete Forme.
  • A rare human example in Pokémon Sun and Moon can be seen with Lusamine and Nihilego during the climax. Lusamine willingly fuses herself with Nihilego in order to defeat the main character once and for all. Upon her defeat, she tries to personally kill her daughter, Lillie, but Solgaleo/Lunala (depending on the version) arrives and defuses the pair.
  • Another (much more bizarre) human example occurs in Omega Ruby and Alpha Sapphire. In an All Your Powers Combined version, the guys who hand out O-Powers in Mauville City perform an event where they circle around another man who lives in an apartment nearby and merge with him one by one, eventually forming Mr. Bonding from Pokémon X and Y.
  • In Pokémon Ultra Sun and Ultra Moon, Necrozma can perform a Grand Theft Me on either Solgaleo or Lunala to form Dusk Mane Necrozma or Dawn Wings Necrozma, respectively, turning Necrozma into some form of armor on the others. From either of these forms, Necrozma can power up further by undergoing a transformation known as Ultra Burst to become Ultra Necrozma.
  • In Pokémon Scarlet and Violet, Tatsugiri has a unique ability called Commander that only works when it is paired with its compatriot Dondozo in a Double Battle. If a Tatsugiri with Commander is on the field at the same time as a Dondozo, Tatsugiri will hop into Dondozo's mouth, removing it from battle. A Tatsugiri that is inside a Dondozo cannot attack nor be targeted for attacks, and while combined neither Pokémon can switch out. In exchange, Dondozo gets a whopping +2 boost to all of its stats, and its Secret Art Order Up gives an additional stat boost every time it's used based on the type of Tatsugiri it's paired with. In lore, Tatsugiri and Dondozo have a symbiotic relationship: Tatsugiri is weak but intelligent, while Dondozo is the Dumb Muscle, so Tatsugiri pairs up with Dondozo and issues commands from inside its mouth to safely hunt for food together.
• In Princess Waltz, the protagonist performs a composite fusion with one of six other characters to create "Sword Princess Iris", who always looks the same except her dress colour, which depends on the character the protagonist fuses with. He also often comments on how Iris feels taller or faster depending on the fusion partner. The game has a pretty straightforward storyline, so no matter which one of the five (actually six, as Chris is a girl too) girls you chose, you always end up with Chris as your main "wife" and the others as a lesser harem.
• Puzzle & Dragons lets you fuse several Mons together, usually three to five at once. These fusions let your mon evolve into a stronger new form, with the evolution usually not similar at all to the mons you chose to fuse it with. Power Booster.
• Quantum Protocol: In the Reprogram menu, the player can combine three duplicate card into a single stronger version of the originals. Doing this isn't always optimal, since there are some cards that work better by using their effect multiple times rather than only once.
• Salazar in Resident Evil 4 fuses with the Queen Plaga and a Verdugo to form the Chapter 4 boss.
• In Robopon, the three Zero cyborgs in Robopon 2 do this to attack Cody one more time as he leaves the Pond Garden, creating the multi-faced abomination called Insector.
• The Final Boss of Romancing SaGa 2 is the Seven Heroes fused together, complete with them being able to attack multiple times a turn.
• Most games in the Shin Megami Tensei franchise let you fuse two or more demons to create a new one; in the classical continuity, it's All There in the Manual (and visually explicit in Shin Megami Tensei IMAGINE) that this effectively kills the original demons in the process. It's not so much a traditional fusion as it's sacrificing two demons and using the Magnetite comprising their bodies to mold the body of a new demon summoned from the Expanse. There also instances of humans fusing with demons, in which case it's a power booster example, as the human absorbs the demon's Magnetite to grow stronger.
  • In most games, you can create new demons/Personae by fusing two or more existing ones together. The new demon can inherit skills from any or all of its "parents" (including some that it wouldn't learn naturally).
  • In Megami Tensei II, getting the good ending requires you to spare Bael so you can later fuse him with Beelzebub, restoring them to their original form of Baal.
  • In Shin Megami Tensei I, early on you can get a Crutch Character by fusing the Protagonist's dog with a demon, to create Cerberus, who also appears later as the gate guardian of Tokyo Destiny Land. Also, the Chaos Hero forcibly fuses with one of your demons when he becomes desperate in seeking power to defeat Ozawa.
  • In Shin Megami Tensei II, it is explained that Satan is the result of a fusion between the demon Seth and a specific human. It is later revealed that the human is your ally Zayin. You cannot stop the fusion, and on the Law route, you'll want the fusion to happen. Astaroth is also revealed to be the gods Ishthar and Ashthar forcibly merged into one by YHWH to demonise them.
  • In Shin Megami Tensei if..., in a very unsubtle reference to Devilman, Akira gets possessed by Amon, and they merge to become a new lifeform.
  • In Shin Megami Tensei III: Nocturne, there are standard fusions and "sacrifice fusions." Entering a certain door with either the first pixie who joined you or a demon made by fusing her will cause that demon to transform back into the original pixie with boosted stats and powers. Using the pixie as a sacrifice will not let you trigger the scene, suggesting that using a demon as a sacrifice will kill them, but regular fusion, not so much.
  • Rather brutally explored in Shin Megami Tensei: Strange Journey: Jack's Squad, who didn't get the Demon Fusion program, are trying to work out the methods themselves... through horrible experiments on captive demons. (One captive begs for the return of its hands and feet.) They're trying to fuse humans with the demons, and judging by the hideous demons you fight in their HQ, the results are not anything good. Jimenez later fuses with Bugaboo with the traditional method (the Demon Summoning Program) to save both of their lives and become a demon himself.
  • In Shin Megami Tensei IV, Jonathan fuses with the Archangels to form Merkabah. Walter also fuses with Lucifer, but this only restores Lucifer's true powers.
  • In Shin Megami Tensei IV: Apocalypse, two major instances occur near the end of the game: Krishna fuses with Flynn to become Vishnu-Flynn, and Merkabah and Lucifer fuse to become Satan again.
  • In Shin Megami Tensei V, the main character merges with Aogami to become a "Nahobino", with the MC retaining control of their body. It's later explained that a Nahobino is a god's original form, which they regain by absorbing the Knowledge stolen from them which is inside humans. Later examples of humans and gods merging into Nahobinos include Sahori and Lahmu, Ichiro and Abdiel, Atsuta and Tsukuyomu, and Yakumo and Nuwa.
  • In Digital Devil Saga, the lead male and female, Serph and Sera, fuse into one ultimate being named Seraph; while the result is mostly controlled by Sera due to Serph being a Heroic Mime, it is stated their minds would eventually merge the same way. This is explicitly a reference to the Hindu religion, where the perfect being is said to be a fusion of both the female and male aspect. An example in Hinduism is Ardha, the fusion of the Shiva and his wife Parvati, who is Seraph's Atma.
• This is how each of the power-ups work in Sonic Colors — Sonic merges with the Wisp to gain its powers. They reappeared in Sonic Lost World, filling the same purpose as they did in Colors. However, in Sonic Forces, they are instead being fused with a gadget called a Wispon.
• In Soul Nomad & the World Eaters, the main character is the 'victim' of a botched Demonic Possession by Omnicidal Maniac ex-Big Bad Gig, which ends with the two Sharing a Body and Gig effectively becoming the main character's Power Booster on a permanent basis. It has the side effects that Gig isn't exactly the most pleasant being to coexist with—and that drawing too much on his power will complete the possession to a manner more to his liking.
• In Spark the Electric Jester 3, Spark and Fark merge together and combine their powers to face off against Claritas Centralis, becoming Sfarx in the process.
• The Final Boss of Spider-Man: Edge of Time is a fusion of Doc Ock, Walker Sloan, and Anti-Venom (or Rhino in the Nintendo DS version) that Spider-Man dubs Atrocity.
• In Star Control II, the Mmrnmhrm (a mechanical sapient race) and the Chenjesu (a crystalline race) are eventually discovered to have merged into a gestalt composite race, the Chmmr. Once they join your alliance, they are able to provide you some small assistance with your combat capabilities. Notably, the fusion process would have taken several decades but, since none of you have that much time (the Ur-Quan Kor-Ah will be on their genocidal warpath much sooner than that), you're forced to speed it up. They imply this ended with an imperfect, incomplete fusion and question you about it, but brush it off quickly because of the aforementioned time problem.
• StarCraft:
  • Two Protoss Templars can fuse into a single, ultra-powerful 'Archon' unit. It is a one-way process, and falls outside the three main types, since the brutal martial prowess of the Archon is quite different from the casting abilities possessed by the Templars. It's explained that, while Templar are very powerful with directed psychic abilities, Archons are the embodiment of raw psychic energy.
  • The above process is inverted by the martially deadly Dark Templars, who can merge to form a Dark Archon, which have a few very powerful "spells" but are completely useless in battle when they're low on mana.
  • In StarCraft II, both the Dark Archons and the announced Twilight Archons were ditched and now any combination of templars results in a conventional Archon, the In-Universe reason being that the Dark Archons are the result of a Dangerous Forbidden Technique and far too powerful (one by the name of Ulrezaj goes nuts and is a big-time villain in the novels).
  • The third expansion pack features Archon Mode, in which two players run the same base and army.
  • StarCraft II: Legacy of the Void reveals that this is how the Xel'naga are born. Two races, one with 'Purity of Form' (the protoss) and one with 'Purity of Essence' (the zerg), meet and eventually merge to become Xel'Naga. However, the rogue Xel'Naga Amon and a group of other like-minded Xel'Naga had sabotaged the Infinite Cycle by corrupting the Zerg and forcibly uplifting the Protoss to ensure that the Xel'Naga would never rise again.
• Tales Series:
  • Tales of Zestiria:
    • One of the game's main gimmicks is Armatization, which allows two party members - a human and a seraph, to fuse into a form known as Armatus. The seraph acts as Power Booster for the human, who in turn gets the power to invoke seraph's magic, an elemental weapon, associated with the seraph, and long blond hair. The human stays in control of the Armatus, but the seraph can take control in certain circumstances.
    • The finale of the anime adaptation Tales of Zestiria the X has Sorey Armatizing with all four of his seraph friends in a form nicknamed by fans "Rainbow Armatus". Given the amount of discrepancies between stories of the game and the anime, it's probably not canon.
    • Near the end of the game Heldalf fuses with a corrupted Maotelus into a monstrous form, and serves as the game's Final Boss. It's actually also a use of Armatization, and the fusion looks draconic because it's the form that all corrupted seraphs take.
  • Tales of Berseria:
    • The game is a prequel to Zestiria, and features Armatization as an experimental and unstable technique, developed and used by the antagonists. It still gives a human the powers a malak counterpart, but it's more like forcing the malak into the human's body, and can kill the user if used improperly. Most of the Mook exorcists end up involuntarily self-destructing after using it.
    • In the second half of the game Teresa voluntary fuses with a Therion to fight the party. Notably, it is not Armatization, but a permanent fusion, in which she becomes a Therion herself. The result is not nearly as pretty as Armatus, as the transformation covers most of her body with black carapace and replaces her left hand with what looks like a maw.
• For the Final Boss of Tomb Raider: Legend, Amanda merges with the Unknown Entity.
• In the Touhou Project series, Utsuho Reiuji (a hell raven youkai) received a Power Booster of sorts by eating the body of a yatagarasu (a divine sun crow), as directed by another goddess, Kanako Yasaka. As a result, she now has power over nuclear fission and fusion, and her body has changed somewhat as well - she now has the yatagarasu's third eye on her chest, a control rod (the "yatagarasu's third leg") on her arm, and "feet of fission and fusion".
  Utsuho Reiuji: The ultimate energy is nuclear fusion power! Won't you fuse with me?
  • The Touhou fandom seems to like making Utsuho herself an unwitting Power Booster for others, such as Mokou Fujiwara, Nitori Kawashiro, and Tenshi Hinanai. Becoming a part of someone else, rather than them becoming a part of her, is probably not what Utsuho had in mind ...
  • And then there's Utsuho's actual Fusion Dance.
• The entire point of Trine is that the three main heroes become a Switcher single main hero due to the titular artifact.
• The final boss of TRON 2.0 is a monster formed from the three main antagonists after their botched attempt to digitalize themselves.
• In Undertale, monsters can absorb human souls as a Power Booster, and if a monster could absorb seven souls, they would have the power of a god. This is central to the kind King Asgore's plan to free his people, as this power is needed to break the barrier trapping him and his subjects underground (you're the seventh, by the way).
  • In the Neutral Endings, Flowey manages to steal the six previously gathered souls, and would have won, except it turns out to be a mild Two Beings One Body fusion, and the collective six human souls are able to resist enough to forcibly overload Flowey and escape.
• In Vampire Survivors, you can combine a max-level Peachone and Ebony Wings into Vandalier, which has the abilities of the former two.
• Warrior Kings has the Light Cavalry unit, the Horse Archer which are only available in campaign mode. To created a Horse Archer, you need to approach a tame unoccupied horse and then move an archer into it. Note that there's no dismounting from the horse, if you need the archer for its greater range then you'll need to make a new one.
• World of Warcraft:
  • Varian Wrynn was split into two different people. The two personas were given two magical Elven swords, Shalla'tor and Ellemayne. When Varian's personas were united again, the fusion also fused the swords together, creating Shalamayne. Shalamayne can also be split apart into Shalla'tor and Ellemayne to allow for Dual Wielding, as seen during Varian's last battle and Varok's Mak'gora.
  • Dredgers in Revendreth are created from the primordial muck of the realm. Special gems can be used to fuse multiple dredgers into a single biggun, hulking brutes who can perform heavy labor and perform basic guard duty.
• Xenoblade Chronicles 3:
  • The six protagonists can form two-person^note Noah and Mio, Eunie and Taion, and Lanz and Sena Ouroboros Interlinks, which act as something in-between Power Booster and Switcher. Specifically, only one person controls the Interlink, and it basically looks like "What if [user] was a Humongous Mecha", but their partner can talk through it, and they can switch control at will, which results in the Interlink form retreating to the core, and a new one emerging. The fusion itself grants them a plethora of new powers, with the most notable being almost-limitless Healing Factor, which regenerates even severed limbs in a matter of seconds. The only downside is that using its powers will cause Interlink to overheat. Gameplay-wise, it will be cancelled at this moment, but story-wise it will cause an annihilation event to occur right around the Interlink.
  • Later it's revealed that the Moebius can also Interlink, and two pairs of them do exactly that in their fights. While one of these pairs follow the same rules as the heroes, the second pair instead merges into some kind of monster with both users partially in control. Oh, and overheating part is true for them, too.
• Yu-Gi-Oh! Reshef of Destruction inverts this with Dark Flare Knight. In the real life game, he's a fusion of Dark Magician and Flame Swordsman. In this game, when the Dark Flare Knight is sent to the graveyard, it Comes Back Strong as Mirage Knight, and when the turn ends, he's de-fused into his original two forms. The game itself has no Fusion Monsters.

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