- Neptune (Mythology)
- Nest
- Netherrealm
- Netherrealm War
- New Dalek Paradigm
- New Gods
- New Hope Research Facility
- New World (Monster Hunter)
- New World (Overlord)
- Nexus
- Nexus (Gears of War)
- Nguruvilu
- Nicodem
- Nidoking
- Nidoqueen
- Nidoran ♀
- Nidoran ♂
- Nidorina
- Nidorino
- Night Terror
- Nightcrawler
- Nightcrawlers
- Nightgaunt
- Nightmare (Dungeons & Dragons)
- Nightmare (Sonic Unleashed)
- Nightmare (Soul Calibur)
- Nightwalker
- Nightwalker (Dungeons & Dragons)
- Nihilanth
- Nine Hells
- Ninetales
- Ningyo
- Nipper Plant
- Nitara
- Nithling
- Nodens
- Noob Saibot
- Noppera-bō
- Nosferatu
- Nosferatu (Resident Evil)
- Noskov
- Novashadow
- Novistador
- Nuckelavee
- Nue
- Nugget
- Nurgle
- Nurse (Malifaux)
- Nyarlathotep
- Nymph
- Nymph (Terraria)
- Nyogtha
- Nyokimon
- Nyssa Damaskinos
- Nyx (Resident Evil)
- Níðhöggr
- Oceanid
- Oceanus
- Octoboo
- Octorok
- Oddish
- Odin
- Ogra
- Ogre
- Ogre (Dungeons & Dragons)
- Ogre (Tekken)
- Ogroman
- Ogryn
- Ohnaka
- Old God
- Old Iron King
- Old One (Warhammer)
- Old One Eye
- Omega Pirate
- Omen War
- Onaga
- One-Eyed Centaur
- One Being
- Oni
- Onix
- Onryo
- Ood
- Ookondoru
- Oorn
- Ooze (Resident Evil)
- Operation: Javier
- Ophelia LaCroix
- Ophiotaurus
- Opium-Pipe Fish
- Oranganann
- Orc
- Orc (Dungeon Keeper)
- Orcus
- Orga
- Organism 46-B
- Organization
- Orin
- Ork
- Orko
- Orochi Hellbeast
- Orthrus (Resident Evil)
- Orthus
- Osh-Tekk
- Osiris
- Osmund Saddler
- Oswald A. Lisker
- Osyluth
- Otachi
- Otis & Clay
- Ouranus (Guyver)
- Outer God
- Outworld
- Outworld Invasion of Earthrealm
- Outworld Tournament
- Overflow
- Overspawn
- Pafumon
- Paimon
- Pale Head
- Pale Night
- Paleosaurus
- Pallas
- Pan
- Panadyne
- Pandia
- Pandora (Malifaux)
- Paomon
- Parademon
- Paragoomba
- Paras
- Parasect
- Parasite Cage
- Parasprite
- Parlor
- Patchouli Knowledge
- Patrick
- Peashooter (Plants vs Zombies)
- Pedro Fernandez
- Pegasus
- Pelager
- Peloquin
- Peluda
- Penanggalan
- Pepo
- Perpetual
- Persephone
- Perses
- Persian
- Peter
- Petitmon
- Phaaze
- Phane
- Phantom Vehicle
- Phaz-Ing
- Phazon
- Phazon Elite
- Phazon Metroid
- Phillip Channard
- Phoebe
- Phoenix
- Phoenix (Harry Potter)
- Phoner
- Phorusrhacos
- Pidgeot
- Pidgeotto
- Pidgey
- Piers Nivans
- Pikachu
- Pillar of Souls
- Pinhead
- Pink Agaricus
- Piranha Plant
- Piranhacus Giganticus
- Pirate
- Pirate Homeworld
- Pistonhead
- Pit Fiend
- Pitchmon
- Pixie
- Plaga Undead
- Plague Crawler
- Planet Wisp
- Planet X
- Planetar
- Plant 42
- Plant 43
- Plasma Bug
- Plasmavore
- Plax
- Pleiades
- Pluto
- Pluto (Resident Evil)
- Plutus
- Pod
- Poison Gamin
- Poison Headcrab
- Poison Zombie
- Poison Zombie (RE2make)
- Pokémon
- Poliwag
- Poliwhirl
- Poliwrath
- Poltergeist
- Poltergeist (Malifaux)
- Polyhymnia
- Pom-Pom
- Ponyta
- Popokarimu
- Popomon
- Popper
- Poseidon
- Possessed
- Possessed Hearse
- Possessor
- Pot Centipede
- Pot Scorpion
- Pot Spider
- Potamoi
- Power Master
- Powerwild
- Poyomon
- Praetorian
- Pregnant
- President Koopa
- Preta
- Priest
- Primarch
- Primeape
- Primordial Magic
- Priscilla
- Progenitor Virus
- Project X
- Prometheus
- Pronghead
- Protoss
- Psimorph
- Psycho Jenny
- Psychovulture
- Psyduck
- Psyker
- Ptera-squirrel
- Pteracuda
- Ptooie
- Pudgy Pig
- Puker
- Pumpkinhead
- Punimon
- Punk Zombie
- Pupumon
- Purifying Flame
- Purple Dragon
- Pururumon
- Puttimon
- Putty
- Puwamon
- Pyramid Head
- Pyramid of Argus
- Pyron
- Python
- Pérák
- Q
- Q (Q- The Winged Serpent)
- Q (Species)
- Quachil Uttaus
- Quan Chi
- Queen Bee
- Queen Dido
- Queen Leech
- Queen Plaga
- Queen Semiramis
- Queen Zenobia
- Queenspawn
- Quell
- Quetzalcoatl
- RAAM
- Ra-Antef
- Rabbit of Caerbannog
- Raccoon City
- Raccoon City Destruction Incident
- Rachel (Nightbreed)
- Rachel Foley
- Rachni
- Rachni Brood Warrior
- Rachni Queen
- Rachni Soldier
- Rachni Wars
- Rachni Worker
- Radinka
- Ragged Knight
- Raichu
- Raiden
- Rain
- Rake
- Rakk
- Rakshasa
- Rakshasa (Dungeons & Dragons)
- Ralph (Rampage movie)
- Rami LaCroix
- Ramon Salazar
- Ramotith
- Rancor
- Randall Boggs
- Randy (HotD)
- Rangifer
- Raphael
- Raphael LaCroix
- Rapidash
- Rare Truffle
- Rasklapanje
- Rasselbock
- Rath
- Rathalos
- Rathian
- Raticate
- Ratling
- Ratman of Southend
- Rattata
- Ravager
- Ravager (Minecraft)
- Raven
- Ravener
- Ravenholm
- Raxacoricofallapatorian
- Razell
- Razordon
- Razorfly
- Razorspine Rattler
- Reaper
- Reaper (Blade)
- Reaper (Doctor Who)
- Reaper Leviathan
- Reaper War
- Reapers (Mass Effect)
- Reaver
- Rebi Ra
- Reckoners
- Red Deep Nightmare
- Red Dragon
- Red Fright
- Red Killer Bee
- Red Nightmare
- Red Nocturne
- Red Rex
- Red Titan
- Redcap
Community content is available under CC-BY-SA unless otherwise noted.