Aliens are beings not from Earth or the main planet of a series - they can vary from terrifying monsters ruled by animal instinct to genius-level super-beings or proud warriors, it was popular in the early days of sci-fi to have aliens resemble humans and they were almost always evil (save for in series such as Star Trek): however as sci-fi progressed the idea of good aliens became more popular (especially after ET) - also after the filme "Alien" came out it became more popular to have parasitic monster-type aliens that were not human in looks or behavior.
All items (766)
K
- Kalibak
- Kamin and Oren
- Kane
- Kang the Conqueror
- Kanjar Ro
- Kat Kommander
- Katella
- Kaworu Nagisa
- Kaynar
- Kerchu Guardian
- Kerrigan
- Kikono
- King Cold
- King Goobot
- King Horn
- King Vega
- Kixx
- Knock Out
- Krackus
- Kragthar of Kraaaaagtttthh
- Krailoni
- Krang
- Krang Army
- Krang's Clones
- Krew
- Krimzon Guard
- Kurumi Tokisaki
- Kybo Ren
L
-
- Larson Petty
- Larson Petty's Army
- Laserbeak
- Lavos
- Lawrence Limburger
- Leah Estrogen
- Ledgic
- Leroy
- Leroy's Clones
- Lio Convoy
- Little Bits
- Little Green Men
- Little Green Men (Toy Story)
- Lobo
- Lockdown
- Loki Master
- Lolo and Lala
- Longbourne
- Lord Beerus
- Lord Chilled
- Lord Commander
- Lord Dominator
- Lord Dregg
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- File:Lord Dregg.png
- Lord Hater
- Lord Havok
- Lord Slug
- Lord Slug's Henchmen
- Lord Vilius
- Lord Vorselon
- Lord Yu-Huang Shang Ti
- Lord Zedd
- Lothor's Army
- Lothorzord/Boss Tau Zant
- Lotor
- Lowlies
- Lucanero
- Lugnut
M
- Ma'alefa'ak
- Madame President
- Mag Mel
- Magenta
- Magolor
- Majin Ozotto
- Majins
- Major Threat
- Mala and Jax-Ur
- Malix
- Mandrake the Malfeasant
- Mangalore
- Mantis
- Marine/Rio Kastle
- Martian King
- Martian Manhunter
- Martians
- Martians (Martians vs. Mexicans)
- Marvin the Martian
- Mary
- Mas Amedda
- Master Cylinder
- Master Vile
- Matai Shang
- Maximus I.Q.
- Meba
- Megatron
- Megatron (Beast Wars)
- Melmacians
- Mephisto (Olocoons)
- Mertock
- Metalheads
- Metaltron
- Metarex
- Metarex's Army
- Microbus
- Military of Great Garmillas Empire
- Mimetic Beasts
- Mindwipe
- Ming the Merciless
- Mira Nova
-
- Mitch (Phineas & Ferb)
- Modo
- Molosco
- Mongal the Alien Warrior
- Mongul
- Monkey Demon (Doraemon)
- Monstar
- Monza Ram
- Monza Ram's Comrades
- Moogers
- Morph
- Morphea
- Mr. Arrow
- Mr. Eye
- Mr. Kat
- Mr. Kitten
- Mr. Snuff
- Mr. Swackhammer
- Ms. Marvel
- Mung
- Mylene Farrow
N
O
P
- Parademons
- Paragus
- Pearl
-
- Phantasmo
- Piccolo
- Piccolo Diamoah
- Pikkon
- PJ
- Pleakley
- Plouton (Halo)
- Poggle the Lesser
- Police Officers (Osmosis Jones)
- Pollyx
- Predacons
- Predaking
- Predators
- Preed
- President Phyronix
- Prince Apophis
- Prince Vekar
- Prophet of Truth
- Prowl
- Proxima Midnight
- Psycrow
- Pui Pui
- Pyron