GOs are a knockoff brand of MOs that appear in BMO (episode). They were created by Hugo.
Candy People • Demons • Dogs • Elementals • Flame People • Gum People • Humans • Lumpy Space People • MOs • Rainicorns • Vampires • Wizards
Bats • Bears • Beavers • Birds • Breakfast People • Bunnies • Catalyst Comets • Cats • Centipedes • Cloud People • Crabbits • Crystal People • Crustaceans • Cyclopes • Deer • Dinosaurs • Dragons • Earthworms • Elephants • Equids • Fire Wolves • Fish • Flambits • Foxes • Frogs • Ghosts • Gnomes • Goblins • Gray Elves • Grays • Hair Apes • Hot Dog People • Hyoomans • Ice Elementals • Insects (Ants • Bees • Butterflies • Caterpillars • Fireflies • Flies • Ladybugs) • Jelly Horses • Jellyfish • Lards (Angler Lards • Grass Lards • Greed Lards • Sea Lards • Space Lards) • Lemon People • Life Given Objects • Martians • Mollusk People • Mudscamps • Mutants • Naked Old People • Old Ladies • Oozers • Party Bears • Penguins • Peanut People • Pigs • Pizza People • Pups • Raccoons • Robots • Rock People • Rodents • Scientific Parasites • Scorpions • Sheep • Skeletons • Slime People • Snakes • Snow Golems • Snow Men • Snow Monsters • Spiders • Spiky People • Turtle People • Veggie People • Villagers • Water Elementals • Warthogs • Wax Hustlers • Werewolves • Wildberry People • Wolves • Worm People • Worms • Zanoits
B'Onangutans • Backrubbers • Bat Bugs • Battle Cubes • Better Reality Minibots • Bland Alien Creatures • Blank-Eyed Girls • Breakfast Organisms • Bulls • Candy Clouds • Candy Corn rats • Candy Probes • Chuds • Cosmic Cloud People • Cows • Crocodiles • Cube People • Cuties • Daddy Sad Heads • Dewdrops • Donkeys • Dormant Jinn • Dream Parasites • Earclopses • Electroids • Evil Giant People • Evil Mini Prismos • Fat Villagers • Fuzzy Friends • Giant Birds • Giant Toadstools • Giraffes • Glass People • Goats • Goo Skulls • GOs • Grasshoppers • Grass Lump People • Grass People • Gridface People • Hippos • House People • Hug Wolves • Hybrid Animals • Hypnosis Fairies • Ice Bulls • Ice Toads • Jake People • Jigglers • Koala Bear People • Little People • Lint Creatures • Lizard People • Lizards • Lub Glubs • Mermaids • Minecraft Endermen • Mini Elves • Moldos • Monster Worms • Moose • Mud Frogs • Mushroom People • Mutant Coyotes • Mutant Newts • Nut People • Octopuses • Pagelings • Pillow People • Plantoids • Rump People • Sand People • Sheet Ghosts • Soft People • Star Nosed Moles • Strong Guys • Swamp Creatures • Transformation Ghouls • Tree People • Tortoises • Turtles • Unknown alien species • Varmints • Weak Guys • Why-wolves