Monstros Fusion são os lacaios malignos de Fuse. Jogadores podem obter Fusion Matter, Taros, C.R.A.T.E.s, Poções para Nanos ou Weapon Boosts após derrotá-los. Há três tipos deles: Adaptium, Blastons ou Cosmix. Se houver um asterisco (*) perto do nome de um local ou monstro, significa que um ou ambos foram removidos. Se houver um perto do nome do local ou do monstro, então um ou ambos não poderão ser encontrados no Retro. (Tenha em mente que alguns monstros estão marcados com em certos locais e em outros não, devido ao reposicionamento de níveis de monstros que ocorreu com a atualização da Academia no jogo original).
Comportamento em relação a jogadores de níveis mais altos[]
Pode-se perceber que monstros passam a "ignorar" jogadores com níveis mais altos que os deles, resultando em passeios mais tranquilos. Porém, eles passarão a atacar assim que o jogador ataque, passe muito perto, ou fique muito tempo perto deles.
Monstros de Nível 1[]
- Null Void
- Fusion Spawn (Cosmix)
- Sector V
- Soulo Shell (Blastons)
- Sector V (The Future)
- Fusion Spawn/Jumbo Fusion Spawn (Cosmix)
- Shocktangler/Electrotangler (Blastons)
- Tech Square (The Future)
- Fusion Spawn/Jumbo Fusion Spawn (Cosmix)
- Cyberus (Blastons)
- Oil Ogre (Blastons)
- Tech Wing (Cosmix)
Monstros de Nível 2[]
- Providence HQ
- Jumbo Fusion Spawn (Cosmix)
- Cyber Stinger (Cosmix)
- Timber Wrecker (Adaptium)
- Stalking Arachnid (Blastons)
- Pokey Oaks North (The Future)
- Cyber Stinger/Cyber Stabber (Blastons)
- Fusion Spawn/Jumbo Fusion Spawn (Cosmix)
- Pokey Oaks South (The Future)
- Bad Burro/Big Bad Burro (Adaptium)
- Noxious Spawn/Sickly Noxious Spawn (Blastons)
- Road Golem/General Golem (Cosmix)
- Genius Grove (The Future)
- Air Drone/Air Drone Enforcer (Cosmix)
- Tech Queen/Tech Queen Widow (Adaptium)
- Tech Drone/Tech Drone Prime (Blastons)
Monstros de Nível 3[]
- Peach Creek Commons (The Future)
- Dire Hydra/Alpha Hydra(Adaptium)
- Painsaw/Bossblade Painsaw (Cosmix)
- Newsprint Ninja/Newsprint Ninja Boss(Blastons)
- Peach Creek Estates (The Future)
- Petroleum Punk/High Octane Punk (Adaptium)
- Sewer Creeper/Sewer Stalker (Cosmix)
- Verminator/Highblast Verminator (Blastons)
- Candy Cove (The Future)
- Tread Head/Two-Ton Tread Head (Cosmix)
- Candy Bandit/Candy Bandit Captain (Blastons)
- Tank Terror/Giant Tank Terror (Adaptium)
Monstros de Nível 4[]
- Goat's Junk Yard (The Future)
- Motor Raptor/Motor Master (Blastons)
- Dread Head/Don Dread Head (Adaptium)
- Toxic Spawn/Highly Toxic Spawn (Cosmix)
- Sector V
- Ultramagno Beetle/Charged Magno Beetle (Cosmix)
- Caterplug/Supercharged Caterplug (Blastons)
- Sneaky Spawn/Super Sneaky Spawn (Adaptium)
- Shocktangler (Blastons) *Somente no Covil do Fusion Número Dois
- Soulo (Blastons)
- Peach Creek Estates (The Future)
- Fusion Blowfish (Blastons) *Somente no evento de Ação de Graças
- Hootie (Adaptium) *Somente no evento de Ação de Graças
Monstros de Nível 5[]
- Pokey Oaks North
- Ball-Peen Meanie/Ball-Peen Slayer (Cosmix)
- Pesky Pony/Husky Horsie (Blastons)
- Mean Behemoth/Boss Behemoth (Cosmix)
- Tech Drone (Blastons) *Somente no Covil do Fusion Edu
Monstros de Nível 6[]
- Pokey Oaks South
- Mad Mower/Raving Mad Mower (Blastons)
- Gravel Golem/Great Gravel Golem (Adaptium)
- Neighborhood Ninja/Nightstalker Ninja (Cosmix)
- Peach Creek Commons
- Hydro Hammer/High Hydro Hammer (Cosmix)
- Power Painsaw/Superpower Painsaw (Blastons)
- Newspaper Ninja/Newspaper Assassin(Adaptium)
- Suspicious Drone (Blastons)
Monstros de Nível 7[]
- Genius Grove
- Doom Drone/Doom Defender (Blastons)
- Tech Tunneler/Tech Tunneler 2.1 (Adaptium)
- Tech Wing/Gigatech Wing (Cosmix)
- Candy Cove
- Creepy Spawn/Mega Creepy Spawn (Cosmix)
- Candy Buccaneer/Buccaneer Commander (Blastons)
- Barrel Basher/Big Barrel Basher (Adaptium)
Monstros de Nível 8[]
- Peach Creek Estates
- Crash Loader/Crash Leader (Blastons)
- Maelstrom Creeper/Maelstrom Brute (Cosmix)
- Heavy Pincher/Heavy Duty Pincher (Adaptium)
- Darkpaper Ninja/Darkpaper Warlord (Blastons)
- Eternal Vistas
- Bloodsucker/Big Bad Bloodsucker (Adaptium)
- Spooka/Spooka Boo (Blastons)
- Joke-O-Lantern/Big Bad Joke-O-Lantern (Cosmix)
- Crazy Metal Knight (Blastons)
- Townsville Park
- Fusion Blowfish (Adaptium) *Somente no evento de Dia das Mães
- Pokey Oaks North/South
- Don Doom (Adaptium)
Monstros de Nível 9[]
- Eternal Meadows
- Batty Bloodsucker/Batty Brampire (Adaptium)
- Spinetingler/Cackling Spinetingler (Blastons)
- Jock-O-Lantern/Dumb Jock-O-Lantern (Cosmix)
- Goat's Junk Yard
- Scrap Scrapper/Scrapper Superior (Adaptium)
- Scrap Tyrant/Scrap Tyrant Champion (Cosmix)
- Junkasaurus Wrecks /Junkasaurus Daddy (Blastons)
Monstros de Nível 10[]
- Foster's Home
- Extremospawn/Super Extremospawn (Blastons)
- Scribble Spawn/Crazy Scribble Spawn (Cosmix)
- Timber Terror/Overgrown Timber Terror (Adaptium)
- Fusion Cheese Puff/Fusion Cheese Doodle/Fusion Big Cheese (A/B/C)
- Endsville
- Jerk-O-Lantern/Pushy Jerk-O-Lantern (Blastons)
- Baron Bloodsucker/Baron Brampire (Blastons)
- Mummy Monster/Big Ol' Mummy Monster (Cosmix)
- Spooky Streetlight/Super Spooky Streetlight (Adaptium)
- Genius Grove
- Fusion Mini Echo/Fusion Mega Echo (Depois das 19:00, Blastons)
Monstros de Nível 11[]
- Nuclear Plant
- Gear Goon/Raving Gear Goon (Cosmix)
- Weird Welder/Weird Welder Foreman (Adaptium)
- Ventilator/Turbo Ventilator (Adaptium)
- Doom Boiler/Doom Boiler Boss (Blastons)
- Prickly Pines
- Tiger Wolf/Tiger Wolf Pack Leader (Cosmix)
- Lazy Metal Boy Scout/Metal Brute Scout (Blastons)
- Wild Skeeter/Queen Skeeter (Adaptium)
Monstros de Nível 12[]
- Habitat Homes
- Ramcycle/Overclocked Ramcycle (Blastons)
- Motorilla/Silverback Motorilla (Adaptium)
- Cylomander/Sir Cylomaster (Cosmix)
- Camp Kidney
- Pack Arachnid/Pack Arachnid Leader (Adaptium)
- Wild Stinger/King Stinger (Blastons)
- Crazy Metal Boy Scout/Crazy Metal Troop Leader (Adaptium)
- Rudy (Blastons)
- City Station
- Time Deviant (Blastons)
- Weak Defense Turret (Blastons)
Monstros de Nível 13[]
- City Point
- Fire Hydra/Blazing Hydrant (Adaptium)
- Destroyusall/Ultramega Destroyusall (Cosmix)
- Dynamite Mouse/Short Fuse Dynamite Mouse (Blastons)
- City Station
- Streetgrinder/Oversized Streetgrinder (Adaptium)
- Asphalt Thief/Asphalt Thief Prince (Blastons)
- Vile Cabinet/Vile Defiler (Cosmix)
Monstros de Nível 14[]
- Mount Blackhead
- Rabid Arachnid/Rabid Arachnid Leader (Adaptium)
- Ghoulish Growth/Goulish Growth Rotter (Blastons)
- Bladed Mantis/Fullblade Mantis (Cosmix)
- Marquee Row
- Sonic Scorpion/Supersonic Scorpion (Cosmix)
- Hydro Slammer/High Hydro Slammer (Adaptium)
- Streetcrusher/Streetcrusher Maniac (Blastons)
Monstros de Nível 15[]
- Leakey Lake
- Great Ironjaw/Lord Razortooth (Adaptium)
- Wild Cogfish/Wild Bossfish (Blastons)
- Striding Eel/Great Striding Eel (Cosmix)
- Creepy Clawdad/Jumbo Clawdad (Blastons)
- Townsville Center, and City Hall
- Heavy Hunter/Heavy Hunter Boss (Cosmix)
- Unisickle/Nitrosickle (Adaptium)
- Asphalt Creep/Giant Road Rager (Blastons)
- Townsville Park
- Dynamite Rat/High Grade Dynamite Rat (Blastons)
- Marquee Row
Monstros de Nível 16[]
- Acorn Flats
- Spider Toad/Nightmare Spider Toad (Cosmix)
- Slime Serpent/Slime Serpent Slicer (Blastons)
- Terrorpin/Mighty Mighty Terrorpin (Adaptium)
- Townsville Park
- Shady Streetlight/Tall Shady Streetlight (Adaptium)
- Asphalt Freak/Asphalt Freak Father (Blastons)
- Dire Raptor/Dire Hunter (Cosmix)
- City Station
- Time Deviant (Cosmix)
- Basic Defense Turret (Cosmix)
Monstros de Nível 17[]
- Pimpleback Mountains
- Dynamite Rat/High Grade Dynamite Rat (Cosmix)
- Breaker Bear/Breaker Boss (Blastons)
- Dark Skeeter/Sir Skeeter (Adaptium)
- Orchid Bay
- Master Tentakiller/Grand Master Tentakiller (Adaptium)
- Boardwalk Brawler/Ironside Brawler (Cosmix)
- Jetskill/Jetskill Hunter (Blastons)
- Boardwalk Bully/Big Boardwalk Bully (Adaptium)
- Glacial Golem (Adaptium)
Monstros de Nível 18[]
- Haunted Ridge
- Cavern Wolf/Alpha Cavern Wolf (Blastons)
- Boarbull/Rogue Boarbull (Cosmix)
- Alpha Arachnid/Omega Arachind (Adaptium)
- Bravo Beach
- Sand Creep/Sand Baron (Blastons)
- Turbo Jetskill/Turbo Jetskill Slyer (Adaptium)
- Beach Bully/ Big Beach Bully (Blastons)
- Squish Scaler/Superfused Squish Scaler (Cosmix)
- Cootie (Cosmix)
- Orchid Bay
Monstros de Nível 19[]
- Twisted Forest
- Granite Grabber/Greatstone Grabber (Adaptium)
- Freakish Frog/President Freakfrog (Cosmix)
- Creeper King/Creeper Kingpin (Blastons)
- Morbucks Towers
- Riot Rogue/Riot Rogue Sergeant (Adaptium)
- Arch Welder/Boss Welder (Blastons)
- Heavy Puncher/Super Heavy Puncher (Cosmix)
- Doomdozer/Doomdozer Foreman (Blastons)
- Mandroid (Blastons)
Monstros de Nível 20[]
- The Ruins
- Dagger Mantis/King Stabber Mantis (Cosmix)
- Necromasher/High Necromasher (Blastons)
- Timber Hulk/Hardwood Hulk (Adaptium)
- Mojo's Volcano
- Spawn Simian/Spawn Simian Captain (Cosmix)
- Wild Wing/Wild Wing King (Blastons)
- Doom Digger/Doom Digger Dynamo (Adaptium)
- City Station
Monstros de Nível 21[]
- Devil's Bluff
- Talon Titan/Titanic Talon Titan (Adaptiums)
- Canyon Stalker/Deep Canyon Stalker (Cosmix)
- Demolition Bear/Demolition Rex (Blastons)
- Galaxy Gardens
- Timber Creeper/Rockwood Creeper (Adaptium)
- Skeeter Spawn/Elder Skeeter Spawn (Cosmix)
- Horror King/Horror Kingpin (Blastons)
Monstros de Nível 22[]
- Devil's Canyon
- Canyon Creeper/Broad Canyon Creeper (Cosmix)
- Pneumatic Bear/Pneumatic Bear Nightmare (Blastons)
- Canyon Colossus/Colossal Colossus (Adaptium)
- Tech Square
- Sky Drone/Sky Demon (Cosmix)
- Mech Queen/Mech Queen Mistress (Adaptium)
- Cyberus/Cyberus Zero (Blastons)
Monstros de Nível 23[]
- Nowhere
- Aubergine Master/High Aubergine Master (Blastons)
- Moussaka Master/Moussaka Master Sergeant (Cosmix)
- Fowl Foe/King-size Fowl (Adaptium)
- Steam Alley
- Baleful Brute/Bigger Brute (Adaptium)
- Putrid Spawn/Putrid Spawn Revolter (Cosmix)
- Oil Ogre/Ogre Overlord (Blastons)
- Gear Goliath/Gear Goliath Gladiator (Adaptium)
Monstros de Nível 24[]
- Area 51.5
- Desert Clawdad/Desert Broadclaw (Blastons)
- Pharaoh Creep/Pharaoh Joe (Cosmix)
- Ghoul Golem/Great Ghoul Golem (Adaptium)
- Fusion Pirate (Cosmix)
- Offworld Plaza
- Killowatt/Surging Killowatt (Adaptium)
- Hydraulic Enforcer/Elephantine Enforcer (Adaptium)
- Sawbreaker/King Sawbreaker (Blastons)
- Thuggard/ Enraged Thuggard (Blastons)
- Clawbreaker/Clawbreaker Fury (Cosmix)
- Nowhere
- Judy (Adaptium)
Monstros de Nível 25[]
- Really Twisted Forest
- Boarbill/Boarbill Charger (Cosmix)
- Brackish Beast/Brackish Beast Father (Adaptium)
- Grime Serpent/Overgrown Grime Serpent (Blastons)
- Lower Catacombs
- Fowl Fiend/Jumbo Fowl Fiend (Cosmix)
- Graveworm/Giant Graveworm (Adaptium)
- Aubergine Meanie/Meanie Master (Blastons)
Monstros de Nível 26[]
- Forgotten Falls
- Great Terrorpin/Great Terrorpin III (Adaptium)
- Striding Lamprey/Prize Lamprey (Cosmix)
- Slizzard/Slizzard Chieftan (Blastons)
- Upper Catacombs
- Cryptworm/Bloated Cryptworm (Adaptum)
- Fowl Freak/Regal Freak (Cosmix)
- Moussaka Meanie/Big Angry Meanie (Blastons)
Monstros de Nível 27[]
- Monkey Mountain
- Scythe Simian/Simian Reaper (Cosmix)
- Razor Mantis/Flashing Razor Mantis (Adaptium)
- Volcano Toad/Magma Toad Master (Blastons)
- Monkey Foothills
- Dire Ape/Alpha Ape (Adaptium)
- Sickle Simian/Sickle Simian Hunter (Cosmix)
- Volcano Vaulter/Mega Magma Vaulter (Blastons)
Monstros de Nível 28[]
- Forsaken Valley
- Terrordactyl/Terrordactyl Screamer (Adaptium)
- Fossil Crawler/Raging Fossil Crawler (Blastons)
- Triceraclops/Trisceraclaw Momma (Blastons)
- Frilled Killer/Amped Frilled Killer (Cosmix)
- Dinosaur Pass
- Fossil Brawler/Bare-Boned Brawler (Cosmix)
- Horrordactyl/Colossal Horrordactyl (Blastons)
- Triceraclaw/Triceraclaw Poppa (Cosmix)
- Frilled Fiend/Frilled Fiend Queen (Adaptium)
Monstros de Nível 29[]
- Fireswamps
- Tar Titan/Titanic Tar Titan (Adaptium)
- Magma Hulk/Master Magma Hulk (Adaptium)
- Creeposaurus Rex/Captain Creepasaurus (Blastons)
- Lizard Queen/Queen Coldblood (Cosmix)
Monstros de Nível 30[]
- Firepits
- Lizard King/King Coldblood (Cosmix)
- Stone Drake/Slag Dragon (Cosmix)
- Miasma Hulk/Master Miasma Hulk (Adaptium)
- Freakosaurus Rex/Father Freakosaurus (Blastons)
- Monkey Foothills
- Tootie
Monstros de Nível 31[]
- Huntor's Crest
- Skull Basher/King Basher (Cosmix)
- Fusionfly/Hyper Fusionfly (Blastons)
- Wooly Behemoth/Ancient Wooly Behemoth (Adaptium)
Monstros de Nível 32[]
- Dark Glade
- Bully Behemoth/Big Bully Behemoth (Blastons)
- Skull Crusher/King Crusher (Adaptium)
- Dark Fusionfly/Queen Fusionfly (Blastons)
- Ghastly Growth/Overgrown Ghastly Growth (Cosmix)
Monstros de Nível 33[]
- Hero's Hollow
- Shellworm/Giga Shellworm (Blastons)
- Eyebulb/Giant Eyebulb (Cosmix)
- Meteoric Sentry/Meteoric Sentry Number One (Adaptium)
Monstros de Nível 34[]
- The Precipice
- Great Eyebulb/Great Eyebulb Gazer (Cosmix)
- Jurassic Centurion/Jurassic Centurion Lord (Adaptium)
- Great Shellworm/Great Shellworm Fury (Blastons)
Monstros de Nível 35[]
- Green Maw
- Slag Cephalopod/Cephalopod Alpha (Adaptium)
- Eyebore/Giant Eyebore (Cosmix)
- Shellslug/Epic Shellslug (Blastons)
Monstros de Nível 36[]
- Fuse's Lair
- Great Shellslug/Great Shellslug King (Blastons)
- Scoria Cephalopod/Cephalopod Prime (Adaptium)
- Meteoric Guardian/Meteoric Guardian Lieutenant (Cosmix)
- Fuse's Labrynth
- Stalactitan/Stalactitan Golem (Blastons)
- Terra Claw (Adaptium)
- Fuse's Hall
- Stalactitan/Stalactitan Golem (Blastons)
- Great Eyebore (Cosmix)
- Fuse's Throne
- Doom Strider (Cosmix)