Here is a list of all the monsters included in each game in the Greenboy Orb series, made by DeliciousBakedPie.
Greenboy Orb 1
- Giant Greenboy Entrance
- Black Tentacles
- Orange Monster
- Brown Popper
- Fancy Blue Monster
- Remade Vampire Monster
- Glue Lava Monster
- Camera Monster
- Ghost Bird
- Animatronic Greenboy
- Animatronic Purple Monster
- Toy Monster Teeth
- Bluegal's Giant Blue Tree
- Soulboy
- Mutated Blue Monster
- Darkman's Summoned Dark Block Beast
- Purple Moustache Monster
- Tall Dark Monster
Greenboy Orb 2
- Giant Russian Entrance Head
- Blue Monster (by Tinfoilbloxion)
- Corrupted Box Monster
- Red Car
- Blue Car
- Cyan Car
- Green Car
- Pink Car
- Purple Monster in a ghost costume
- Dry Ice Golem (by BadTheBloxxer)
- Evil Cyborg Yeti (by Micky455)
- Death Snow Worm (by Uglygarlic)
- Business Icebird (by HotDeliciousCake)
- Bluey
- Greeny
Greenboy Orb 3
- Red Monster Entrance
- Floating Eyeballs
- Blue Wallsucker
- Red Octopus Monster
- Hanging Spiders
- Eye Stalk Monster - Tall
- Eye Stalk Monster - Short
- Creepy Puppet Monster
- Purple Multi-eyed Monster
Greenboy Orb 4
- Ticket Stand Monster
- Amber Fly
- Amber Bee
- Security Cameras
- "Secretly-Living" Statue Artifact
- Crazy Dinosaur Skeleton
- Turquoise Monster Cook
- Logwood
- Melting Noob/Robloxian
- Scary Robloxian Statue
- Scary Fly Amber
- Abomination Bone Monster
- Crazy Raptor Skeleton
- Scary Clown Exit
- Yellow Robot T-Rex
- Orange Robot Branchiosaurus
- Brown Robot Ankylosaurus
Greenboy Orb 5
- Arrow Monster
- Brain Germ
- Liver Toxins
- White Blood Cell
- Red Blood Cell
- Emotion Cell
- Pulsing Skeleton Monster
- Dark Cell
- Bacteria Popper
- Mutated Organ Monster
- Lime Green Blood Cell
- Burrito Sharpsteen
- Mr. Heartrip
- Pink Wallsucker
- Giant Germ Monster
- Germ Block Monster
- Red Germ Block
- Red Blood Cell (wearing sunglasses)
- Red Blood Cell (swimming on a floaty)
- Red Blood Cell (holding a glass of water)
- Brain Squid
Greenboy Orb 6
- Jumbo-sized Greenboy Robot Toy
- "Whoever is inside this box"
- Piranhas
- Director Octopus
- Squid Worker
- Camera Monster
- Spike Monster
- Blimpy (Blimp Buffet Mascot)
- Polkadot Monster Arm
- Triple-armed Red Monster
- Green Female Monster Arm
- Bumpy Red Monster Arm
- "Familiar" Ghost Monster (Soulboy)
- Grimblox's Arms (cameo appearance)
- Plague Doctor Bird
- Flying Scary Skeleton Monster
- Scary Paper Bird Monster
- 2-headed Zombie Dragon
- Cloud Fish
- Winged Clock
- Flying Orange Speaker Monster
- Poe the Uglydragon (cameo appearance)
- Baseballs
- Flying Demon Birds
- Very tall Red Swirl Monster
- Sad Engine Monster
- Skeleton Monster
- The Volcano
Greenboy Orb 7
- Giant Siamese Cat Head
- Spinning Doodle Block
- Platform Exit
- Platform Box Entrance
- Light-blue Eyeball Monster
- Trumpetface Rainbow Flower
- Ghost Ball
- King Sock
- Spider Popper
- Hybrid Toy
- Child's Nightmare
- the Pumpkin Blocks
- Sock Puppet Monsters
- Black Techno 'X' Monster
- Wall-merging Monster
- Blue Zipper Monster
- Scary Wire-tongue Mime Caterpillar
- Wacky Beaver
- Jellyjim
- Ballerina Spider
- Dark Beast
- Crazy Techno Monster
- Various Monsters (in holes)
- the Diamond Walker
- Ballpit Monster
- The Scarecrow
- Evil Flower Monster
- The Counter
- Blue Fire Devil
- Flimsy Miron
- Cyan Monster SS. Entrance
- Giant Olive Monster Slide
- Pink Signholder Monster
- Eyeye
- Acid-drooling Oni
- Silver Chrome Brain
- Weirdonator
- Blue Ball
- Yellow Ball
- Green Frog Ball
- Red Angry Ball
- Purple Eye Ball
- Cyan Big-nose Ball
- Blue Starry Ball
- Eyeball Ball Monster
- Cyclops Lime Ball
- Dark Techno Ball
- Upside-down Purple Puppet Ball
- Baby Brown Ball
- DeliciousBakedBall
- Zig-zag Cyan Ball
- Mutated Red Ball
- Retro Purple Block
- Remade Spinning Evil Smiley
- Evil Green Crayon
- Evil Red Crayon
- Evil Blue Crayon
- Evil Orange Crayon
- Withered/Revived Hackjacker (destroyed)
- Hackjacker's AI Pilot
Greenboy Orb 8
- Chonga the Giant Baby
- Puzzle Golem (boss)
- Puzzle Monster Entrance
- Glass Entrance Wall Monster
- Dizzy Monster Entrance
- Giant Gear Monster
- Weird Gear Monster
- Orange Puzzle Minion
- Green Puzzle Minion
- Yellow Puzzle Minion
- Blue Puzzle Minion
- Red Puzzle Minion
- Donut Minion (cameo)
- Pointing "Broken Button" Monster
- Roach Monster
- Roaches
- Roach (Food Orb 9 cameo)
- Blue Arm
- Puzzle Micko
- Puzzle Apprentice
- Puzzle Demon Spider
- Weird Coach Monster
- Weird Grandfather Clock
- Coach Dwellers
- Reflection of Coach Dwellers
- The Giant Rubix Cube
- Tree Monster
- Killing Bees
- Tiny Window Spike Spider
- Simple Eyestalk Monster
- Alternate Simple Eyestalk Monster
- Color-fused Monster
- Corrupted Color-fused Monster
- Dizzy Spiral Ball
- Giant Eyeball
- Mr. Guzzle Wuzzle
- Turtlehead Choose-Path Monster
- Nightmare KitKat Clock
- Nightmare Potatohead Toy
- Nightmare Giant Robot Toy
- Nightmare Scary Clown Toy
- Nightmare Frostbite Toy
- Dizzy Flowers
- Crazy Dizzy Flower Monster
- Puzzle Space Sharks (6)
- Dead Puzzle Space Sharks (5)
- Dream Lizard Monster
- Dream Monsters
- Stickman Prisoner Monster
- Scary Stickman Prisoner Monster
- Eye Spider
- Creepy Black Popper
- Weird Bigtooth Popper
- Weird Tentacle-mouth Popper
- Weird Orange Popper
- Weird Blue Popper
- Razor Bear (cameo)
- Lip Monster
- Dizzy Sphere Brain
- Giant Orange Eye
- Giant Pink Eye
- Hanging Eyeball Décor
- Sad Monster
- Scared Popcorn Kernels
- Generic Skeleton
- Giant Ice Snake
- The Cafeteria Monsters (with Tony, Soulboy, Jimmy, Question Monster, Poe, Septiceye, and Tinfoilbloxion as cameos)
- Squishy (squid pet of DeliciousBakedPie)