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Fusion monsters are evil minions of Fuse. Players can obtain Fusion Matter, Taros, and/or C.R.A.T.E.s by defeating them, and Nano Potions and/or Weapon Boosts if they are level 5 or above. They can be one of three Types: Adaptium, Blastons, or Cosmix. If there is an asterisk * next to a monster or location, it has been removed. If Not in Retro Small is next to the name of a place, then that location is not available in Retro. If Not in Retro Small is next to a monster name, then that monster is not available in Retro. (Keep in mind that certain monsters may be marked with Not in Retro Small under some locations/levels and not under others, due to the reshuffling of monster levels and locations due to the Academy update in the original game).

Behaviour to higher-level players

Monsters are known to "ignore" players with their level higher than they have, resulting in an easy pass-by. However, when players attack these monsters, run very close to them, or spend a long time near them, such monsters will start attacking.

Level 1 Monsters

Location Image Monster Boss Type
Sector V (The Future) Fusion Spawn Fusion Spawn Jumbo Fusion Spawn Cosmix
Shocktangler Shocktangler Electrotangler Blastons
Tech Square (The Future) Fusion Spawn Fusion Spawn N/A Cosmix
Cyberus Cyberus N/A Blastons
Oil Ogre Oil Ogre N/A Blastons
Tech Wing Tech Wing N/A Cosmix
Null Void

Not in Retro Small

Fusion Spawn Fusion Spawn Not in Retro Small N/A Cosmix
Sector V Soulo Shell Soulo Shell

Not in Retro Small

N/A Blastons

Level 2 Monsters

Location Image Monster Boss Type
Genius Grove (The Future) Air Drone Air Drone Air Drone Enforcer Cosmix
Tech Queen Tech Queen Tech Queen Widow Adaptium
Tech Drone Tech Drone Tech Drone Prime Blastons
Pokey Oaks North (The Future) Cyber Stinger Cyber Stinger Cyber Stabber Blastons
Fusion Spawn Fusion Spawn Jumbo Fusion Spawn Cosmix
Pokey Oaks South (The Future) Bad Burro Bad Burro Big Bad Burro Adaptium
Noxious Spawn Noxious Spawn Sickly Noxious Spawn Blastons
Road Golem Road Golem General Golem Cosmix
Providence HQ

Not in Retro Small

Fusion Spawn N/A Jumbo Fusion Spawn

Not in Retro Small

Cosmix
Cyber Stinger Cyber Stinger

Not in Retro Small

N/A Cosmix
Timber Terror Timber Wrecker

Not in Retro Small

N/A Adaptium
Rabid Arachnid Stalking Arachnid

Not in Retro Small

N/A Blastons

Level 3 Monsters

Location Image Monster Boss Type
Candy Cove (The Future) Candy Bandit Candy Bandit Candy Bandit Captain Blastons
Tank Terror Tank Terror Giant Tank Terror Adaptium
Tread Head Tread Head Two-Ton Tread Head Cosmix
Peach Creek Commons
(The Future)
Dire Hydra Dire Hydra Alpha Hydra Adaptium
Painsaw Painsaw Bossblade Painsaw Cosmix
Newsprint Ninja Newsprint Ninja Newsprint Ninja Boss Blastons
Peach Creek Estates
(The Future)
Petroleum Punk Petroleum Punk High Octane Punk Adaptium
Sewer Creeper Sewer Creeper Sewer Stalker Cosmix
Verminator Verminator Highblast Verminator Blastons

Level 4 Monsters

Location Image Monster Boss Type
Goat's Junk Yard (The Future) Dread Head Dread Head Don Dread Head Adaptium
Motor Raptor Motor Raptor Motor Master Blastons
Toxic Spawn Toxic Spawn Highly Toxic Spawn Cosmix
Sector V Caterplug Caterplug Supercharged Caterplug Blastons
Sneaky Spawn Sneaky Spawn Super Sneaky Spawn Adaptium
Ultramagno Beetle Ultramagno Beetle Charged Magno Beetle Cosmix
Shocktangler Shocktangler
(Fusion Numbuh Two's lair only)Not in Retro Small
N/A Blastons
Spooka Soulo

Not in Retro Small

N/A Blastons
Peach Creek Estates (The Future) Blowfishfusion Fusion Blowfish
*Thanksgiving Event onlyNot in Retro Small
Hootie Adaptium
Blowfishfusion Hootie
*Thanksgiving Event onlyNot in Retro Small
N/A Blastons

Level 5 Monsters

Location Image Monster Boss Type
Pokey Oaks North Ball-Peen Meanie Ball-Peen Meanie Ball-Peen Slayer Cosmix
Mean Behemoth Mean Behemoth Boss Behemoth Cosmix
Pesky Pony Pesky Pony Husky Horsie Blastons
Tech Drone Tech Drone
*Fusion Eddy's lair only. Not in Retro Small
N/A Blastons

Level 6 Monsters

Location Image Monster Boss Type
Pokey Oaks North Party Popper Party Popper
*Birthday Bash onlyRetro Exclusive Small
Adaptium
Birthday Basher Birthday Basher
*Birthday Bash only Retro Exclusive Small
Adaptium
Pokey Oaks South Gravel Golem Gravel Golem Great Gravel Golem Adaptium
Neighborhood Ninja Neighborhood Ninja Nightstalker Ninja Cosmix
Mad Mower Mad Mower Raving Mad Mower Blastons
Party Popper Party Popper
*Birthday Bash onlyRetro Exclusive Small
Adaptium
Birthday Basher Birthday Basher
*Birthday Bash only Retro Exclusive Small
Adaptium
Peach Creek Commons Hydro Hammer Hydro Hammer High Hydro Hammer Cosmix
Newspaper Ninja Newspaper Ninja Newspaper Assassin Adaptium
Power Painsaw Power Painsaw Superpower Painsaw Blastons
Air Drone Suspicious Drone

Not in Retro Small

N/A Blastons

Level 7 Monsters

Location Image Monster Boss Type
Genius Grove Doom Drone Doom Drone Doom Defender Blastons
Tech Tunneler Tech Tunneler Tech Tunneler 2.1 Adaptium
Tech Wing Tech Wing Gigatech Wing Cosmix
Candy Cove Barrel Basher Barrel Basher Big Barrel Basher Adaptium
Candy Buccaneer Candy Buccaneer Buccaneer Commander Blastons
Creepy Spawn Creepy Spawn Mega Creepy Spawn Cosmix

Level 8 Monsters

Location Image Monster Boss Type
Eternal Vistas Bloodsucker Bloodsucker Big Bad Bloodsucker Adaptium
Joke-O-Lantern Joke-O-Lantern Big Bad Joke-O-Lantern Cosmix
Spooka Spooka Spooka Boo Blastons
Lazy Metal Boy Scout Crazy Metal Knight

Not in Retro Small

N/A Blastons
Goat's Junk Yard Crash Loader Crash Loader
*There is a single Crash Loader in this location
N/A Blastons
Peach Creek Estates Crash Loader Crash Loader Crash Leader Blastons
Heavy Pincher Heavy Pincher Heavy Duty Pincher Adaptium
Maelstrom Creeper Maelstrom Creeper Maelstrom Brute Cosmix
Darkpaper Ninja Darkpaper Ninja

Not in Retro Small

Darkpaper Warlord
(level 10)Not in Retro Small
Blastons
Pokey Oaks North/South Don Doom Don Doom Adaptium
Townsville Park Blowfishfusion Fusion Blowfish
*Mother's day event only Not in Retro Small
N/A Adaptium

Level 9 Monsters

Location Image Monster Boss Type
Eternal Meadows Batty Bloodsucker Batty Bloodsucker Batty Brampire Adaptium
Jock-O-Lantern Jock-O-Lantern Dumb Jock-O-Lantern Cosmix
Spinetingler Spinetingler Cackling Spinetingler Blastons
Goat's Junk Yard Junkasaurus Wrecks Junkasaurus Wrecks Junkasaurus Daddy Adaptium
Scrap Scrapper Scrap Scrapper Scrapper Superior Adaptium
Scrap Tyrant Scrap Tyrant Scrap Tyrant Champion Cosmix

Level 10 Monsters

Location Image Monster Boss Type
Foster's Home Extremospawn Extremospawn Super Extremospawn Blastons
Scribble Spawn Scribble Spawn Crazy Scribble Spawn Cosmix
Timber Terror Timber Terror Overgrown Timber Terror Adaptium
Fusion Cheese Puff Fusion Cheese Puff

Not in Retro Small

Fusion Cheese Doodle Adaptium
Fusion Cheese Doodle Fusion Cheese Doodle

Not in Retro Small

Fusion Big Cheese Blastons
Fusion Big Cheese Fusion Cheese Doodle Fusion Big Cheese

Not in Retro Small

Cosmix
Endsville Baron Bloodsucker Baron Bloodsucker Baron Brampire Blastons
Jerk-O-Lantern Jerk-O-Lantern Pushy Jerk-O-Lantern Blastons
Mummy Monster Mummy Monster Big Ol' Mummy Monster Cosmix
Spooky Streetlight Spooky Streetlight Super Spooky Streetlight Adaptium
Peach Creek Estates Bad Max Bad Max Adaptium
Darkpaper Ninja Darkpaper Ninja
(level 8)
Darkpaper Warlord

Not in Retro Small

Blastons
Genius Grove Fusion Mini Echo Fusion Mini Echo Fusion Mega Echo Blastons
*During a specific timeNot in Retro Small

Level 11 Monsters

Location Image Monster Boss Type
Nuclear Plant Doom Boiler Doom Boiler Doom Boiler Boss Blastons
Gear Goon Gear Goon Raving Gear Goon Cosmix
Ventilator Ventilator Turbo Ventilator Adaptium
Weird Welder Weird Welder Weird Welder Foreman Adaptium
Prickly Pines Lazy Metal Boy Scout Lazy Metal Boy Scout Metal Brute Scout Blastons
Tiger Wolf Tiger Wolf Tiger Wolf Pack Leader Cosmix
Wild Skeeter Wild Skeeter Queen Skeeter Adaptium

Level 12 Monsters

Location Image Monster Boss Type
Camp Kidney Crazy Metal Boy Scout Crazy Metal Boy Scout Crazy Metal Troop Leader Adaptium
Pack Arachnid Pack Arachnid Pack Arachnid Leader Adaptium
Wild Stinger Wild Stinger King Stinger Blastons
Rudy Fusion Rudy Blastons
Habitat Homes Cylomander Cylomander Sir Cylomaster Cosmix
Motorilla Motorilla Silverback Motorilla Adaptium
Ramcycle Ramcycle Overclocked Ramcycle Blastons
City Station Time Deviant Time Deviant

Not in Retro Small

N/A Blastons
Weak Defense Turret Weak Defense Turret

Not in Retro Small

Blastons

Level 13 Monsters

Location Image Monster Boss Type
City Point Destroyusall Destroyusall Ultramega Destroyusall Cosmix
Dynamite Mouse Dynamite Mouse Short Fuse Dynamite Mouse Blastons
Fire Hydra Fire Hydra Blazing Hydrant Adaptium
City Station Asphalt Thief Asphalt Thief Asphalt Thief Prince Blastons
Streetgrinder Streetgrinder Oversized Streetgrinder Adaptium
Vile Cabinet Vile Cabinet Vile Defiler Cosmix

Level 14 Monsters

Location Image Monster Boss Type
Marquee Row Hydro Slammer Hydro Slammer High Hydro Slammer Adaptium
Sonic Scorpion Sonic Scorpion Supersonic Scorpion Cosmix
Streetcrusher Streetcrusher Streetcrusher Maniac Blastons
Mount Blackhead Bladed Mantis Bladed Mantis Fullblade Mantis Cosmix
Ghoulish Growth Ghoulish Growth Goulish Growth Rotter Blastons
Rabid Arachnid Rabid Arachnid Rabid Arachnid Leader Adaptium

Level 15 Monsters

Location Image Monster Boss Type
Leakey Lake Creepy Clawdad Creepy Clawdad Jumbo Clawdad Blastons
Great Ironjaw Great Ironjaw Lord Razortooth Adaptium
Striding Eel Striding Eel Great Striding Eel Cosmix
Wild Cogfish Wild Cogfish Wild Bossfish Blastons
Townsville Center
City Hall
Asphalt Creep Asphalt Creep Giant Road Rager Blastons
Heavy Hunter Heavy Hunter Heavy Hunter Boss Cosmix
Unisickle Unisickle Nitrosickle Adaptium
Townsville Park Dynamite Rat Dynamite Rat

Not in Retro Small

High Grade Dynamite Rat

Not in Retro Small

Blastons
Marquee Row Darkpaper Disciple Darkpaper Disciple
*Fusion Buttercup's Lair only Not in Retro Small
N/A Blastons
Habitat Homes Rage Roadkiller Rage Roadkiller Retro Exclusive Small Blastons

Level 16 Monsters

Location Image Monster Boss Type
Acorn Flats Slime Serpent Slime Serpent Slime Serpent Slicer Blastons
Spider Toad Spider Toad Nightmare Spider Toad Cosmix
Terrorpin Terrorpin Mighty Mighty Terrorpin Adaptium
Townsville Park Asphalt Freak Asphalt Freak Asphalt Freak Father Blastons
Dire Raptor Dire Raptor Dire Hunter Cosmix
Shady Streetlight Shady Streetlight Tall Shady Streetlight Adaptium
City Station Time Deviant Time Deviant

Not in Retro Small

Cosmix
Basic Defense Turret Basic Defense Turret

Not in Retro Small

Cosmix

Level 17 Monsters

Location Image Monster Boss Type
Pimpleback Mountains Breaker Bear Breaker Bear Breaker Boss Blastons
Dark Skeeter Dark Skeeter Sir Skeeter Adaptium
Dynamite Rat Dynamite Rat High Grade Dynamite Rat Cosmix
Orchid Bay Boardwalk Brawler Boardwalk Brawler Ironside Brawler Cosmix
Boardwalk Bully Boardwalk Bully Big Boardwalk Bully Adaptium
Master Tentakiller Master Tentakiller Grand Master Tentakiller Adaptium
Jetskill Jetskill Jetskill Hunter Blastons
Glacial Golem Glacial Golem

Not in Retro Small

N/A Adaptium

Level 18 Monsters

Location Image Monster Boss Type
Bravo Beach Beach Bully Beach Bully Big Beach Bully Blastons
Sand Creep Sand Creep Sand Baron Blastons
Squish Scaler Squish Scaler Superfused Squish Scaler Cosmix
Turbo Jetskill Turbo Jetskill Turbo Jetskill Slayer Adaptium
Cootie Fusion Cootie Cosmix
Haunted Ridge Alpha Arachnid Alpha Arachnid Omega Arachnid Adaptium
Boarbull Boarbull Rogue Boarbull Cosmix
Cavern Wolf Cavern Wolf Alpha Cavern Wolf Blastons
Orchid Bay Ice Titan Ice Titan

Not in Retro Small

N/A Blastons

Level 19 Monsters

Location Image Monster Boss Type
Morbucks Towers Arch Welder Arch Welder Boss Welder Blastons
Doomdozer Doomdozer Doomdozer Foreman Blastons
Riot Rogue Riot Rogue Riot Rogue Sergeant Adaptium
Heavy Puncher Heavy Puncher Super Heavy Puncher Cosmix
Mandroid enemy level 19 Mandroid
*Fusion Mandark's Lair only
N/A Blastons
Twisted Forest Creeper King Creeper King Creeper Kingpin Blastons
Freakish Frog Freakish Frog President Freakfrog Cosmix
Granite Grabber Granite Grabber Greatstone Grabber Adaptium

Level 20 Monsters

Location Image Monster Boss Type
Mojo's Volcano Doom Digger Doom Digger Doom Digger Dynamo Adaptium
Spawn Simian Spawn Simian Spawn Simian Captain Cosmix
Wild Wing Wild Wing Wild Wing King Blastons
The Ruins Dagger Mantis Dagger Mantis King Stabber Mantis Cosmix
Necromasher Necromasher High Necromasher Blastons
Timber Hulk Timber Hulk Hardwood Hulk Adaptium
City Station Bioid Echo Echo Bioid Echo Echo

Not in Retro Small

N/A Adaptium
Strong Defense Turret Strong Defense Turret

Not in Retro Small

Adaptium

Level 21 Monsters

Location Image Monster Boss Type
Devil's Bluff Canyon Stalker Canyon Stalker Deep Canyon Stalker Cosmix
Demolition Bear Demolition Bear Demolition Rex Blastons
Talon Titan Talon Titan Titanic Talon Titan Adaptium
Galaxy Gardens Horror King Horror King Horror Kingpin Blastons
Skeeter Spawn Skeeter Spawn Elder Skeeter Spawn Cosmix
Timber Creeper Timber Creeper Rockwood Creeper Adaptium

Level 22 Monsters

Location Image Monster Boss Type
Devil's Canyon Canyon Colossus Canyon Colossus Colossal Colossus Adaptium
Canyon Creeper Canyon Creeper Broad Canyon Creeper Cosmix
Pneumatic Bear Pneumatic Bear Pneumatic Bear Nightmare Blastons
Tech Square Cyberus Cyberus Cyberus Zero Blastons
Mech Queen Mech Queen Mech Queen Mistress Adaptium
Sky Drone Sky Drone Sky Demon Cosmix

Level 23 Monsters

Location Image Monster Boss Type
Nowhere Aubergine Master Aubergine Master High Aubergine Master Blastons
Fowl Foe Fowl Foe King-size Fowl Adaptium
Moussaka Master Moussaka Master Moussaka Master Sergeant Cosmix
Steam Alley Baleful Brute Baleful Brute Bigger Brute Adaptium
Gear Goliath Gear Goliath Gear Goliath Gladiator Adaptium
Oil Ogre Oil Ogre Ogre Overlord Blastons
Putrid Spawn Putrid Spawn Putrid Spawn Revolter Cosmix

Level 24 Monsters

Location Image Monster Boss Type
Area 51.5 Desert Clawdad Desert Clawdad Desert Broadclaw Blastons
Ghoul Golem Ghoul Golem Great Ghoul Golem Adaptium
Pharaoh Creep Pharaoh Creep Pharaoh Joe Cosmix
Fusion Pirate Fusion Pirate
*Fusion Stickybeard's
Secret Lair only
N/A Cosmix
Offworld Plaza Clawbreaker Clawbreaker Clawbreaker Fury Cosmix
Hydraulic Enforcer Hydraulic Enforcer Elephantine Enforcer Adaptium
Killowatt Killowatt Surging Killowatt Adaptium
Sawbreaker Sawbreaker King Sawbreaker Blastons
Thuggard Thuggard Enraged Thuggard Blastons
Nowhere Judy Fusion Judy Adaptium

Level 25 Monsters

Location Image Monster Boss Type
Lower Catacombs Aubergine Meanie Aubergine Meanie Meanie Master Blastons
Fowl Fiend Fowl Fiend Jumbo Fowl Fiend Cosmix
Graveworm Graveworm Giant Graveworm Adaptium
Really Twisted Forest Boarbill Boarbill Boarbill Charger Cosmix
Brackish Beast Brackish Beast Brackish Beast Father Adaptium
Grime Serpent Grime Serpent Overgrown Grime Serpent Blastons

Level 26 Monsters

Location Image Monster Boss Type
Forgotten Falls Great Terrorpin Great Terrorpin Great Terrorpin III Adaptium
Slizzard Slizzard Slizzard Chieftan Blastons
Striding Lamprey Striding Lamprey Prize Lamprey Cosmix
Upper Catacombs Cryptworm Cryptworm Bloated Cryptworm Adaptium
Fowl Freak Fowl Freak Regal Freak Cosmix
Moussaka Meanie Moussaka Meanie Big Angry Meanie Blastons

Level 27 Monsters

Location Image Monster Boss Type
Monkey Foothills Dire Ape Dire Ape Alpha Ape Adaptium
Sickle Simian Sickle Simian Sickle Simian Hunter Cosmix
Volcano Vaulter Volcano Vaulter Mega Magma Vaulter Blastons
Monkey Mountain Razor Mantis Razor Mantis Flashing Razor Mantis Adaptium
Scythe Simian Scythe Simian Simian Reaper Cosmix
Volcano Toad Volcano Toad Magma Toad Master Blastons

Level 28 Monsters

Location Image Monster Boss Type
Dinosaur Pass Fossil Brawler Fossil Brawler Bare-Boned Brawler Cosmix
Frilled Fiend Frilled Fiend Frilled Fiend Queen Adaptium
Horrordactyl Horrordactyl Colossal Horrordactyl Blastons
Triceraclaw Triceraclaw Triceraclaw Poppa Cosmix
Forsaken Valley Fossil Crawler Fossil Crawler Raging Fossil Crawler Blastons
Frilled Killer Frilled Killer Amped Frilled Killer Cosmix
Terrordactyl Terrordactyl Terrordactyl Screamer Adaptium
Triceraclops Triceraclops Triceraclaw Momma Blastons

Level 29 Monsters

Location Image Monster Boss Type
Fireswamps Creeposaurus Rex Creeposaurus Rex Captain Creepasaurus Blastons
Lizard Queen Lizard Queen Queen Coldblood Cosmix
Magma Hulk Magma Hulk Master Magma Hulk Adaptium
Tar Titan Tar Titan Titanic Tar Titan Adaptium

Level 30 Monsters

Location Image Monster Boss Type
Firepits Freakosaurus Rex Freakosaurus Rex Father Freakosaurus Blastons
Lizard King Lizard King King Coldblood Cosmix
Stone Drake Stone Drake Slag Dragon Cosmix
Miasma Hulk Miasma Hulk Master Miasma Hulk Adaptium
Monkey Foothills Tootie Fusion Tootie Blastons
Bravo Beach Shipwrecker Shipwrecker Retro Exclusive Small Adaptium
Booty Baddie Booty Baddie Retro Exclusive Small Blastons

Level 31 Monsters

Location Image Monster Boss Type
Huntor's Crest Fusionfly Fusionfly Hyper Fusionfly Blastons
Skull Basher Skull Basher King Basher Cosmix
Wooly Behemoth Wooly Behemoth Ancient Wooly Behemoth Adaptium

Level 32 Monsters

Location Image Monster Boss Type
Dark Glade Bully Behemoth Bully Behemoth Big Bully Behemoth Blastons
Dark Fusionfly Dark Fusionfly Queen Fusionfly Blastons
Ghastly Growth Ghastly Growth Overgrown Ghastly Growth Cosmix
Skull Crusher Skull Crusher King Crusher Adaptium

Level 33 Monsters

Location Image Monster Boss Type
Hero's Hollow Eyebulb Eyebulb Giant Eyebulb Cosmix
Meteoric Sentry Meteoric Sentry Meteoric Sentry Number One Adaptium
Shellworm Shellworm Giga Shellworm Blastons

Level 34 Monsters

Location Image Monster Boss Type
The Precipice Great Eyebulb Great Eyebulb Great Eyebulb Gazer Cosmix
Great Shellworm Great Shellworm Great Shellworm Fury Blastons
Jurassic Centurion Jurassic Centurion Jurassic Centurion Lord Adaptium

Level 35 Monsters

Location Image Monster Boss Type
Green Maw Slag Cephalopod Slag Cephalopod Cephalopod Alpha Adaptium
Eyebore Eyebore Giant Eyebore Cosmix
Shellslug Shellslug Epic Shellslug Blastons

Level 36 Monsters

Location Image Monster Boss Type
Fuse's Lair Great Shellslug Great Shellslug Great Shellslug King Blastons
Meteoric Guardian Meteoric Guardian Meteoric Guardian Lieutenant Cosmix
Scoria Cephalopod Scoria Cephalopod Cephalopod Prime Adaptium
Fuse's Labyrinth Terra Claw Terra Claw N/A Adaptium
Stalactitan Stalactitan Stalactitan Golem Blastons
Stalactitan Stalactitan Golem Adaptium
Fuse's Hall Great Eyebore Great Eyebore N/A Cosmix
Stalactitan Stalactitan Stalactitan Golem Blastons
Stalactitan Stalactitan Golem Adaptium
Fuse's Throne Doom Strider Doom Strider N/A Cosmix

Level 40 Monsters

Location Image Monster Boss Type
Dinosaur Pass Dark Horntail Dark Horntail Retro Exclusive Small Adaptium
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