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IncillianIncubatorIncursean
IndogeneIndoumodoanInfectoid
InfestorInfi-KnightIng
IngaviIngclawInglet
Inglet (Faster Than Light)IngsmasherIngsphere Cache
IngstormIngwormIngworm Cache
InheritorInkieInky
InleshatInner VoiceInner Worlder
Inquisitor CzevakInquisitor KryptmanInsect-mandibles Alien
InsectoidInsectoid (Brewster Rockit)Insectoid (Gohan's Rage)
Insectoid (Star Trek: Discovery)Insectoid (Transformers: Cyberverse)Insectoid (Wildstorm)
InsectophagusInsectroxInspector 13's Species
Instant MartianIntarianIntegral (Doctor Who)
Integrated Data EntityIntegrated Data Sentient EntityIntelliton
Inter-Species ReproductionInter MinorianInterdimensional Being
Interdimensional BugIntergalactic ConfederationIntergalactic Vac Pac
Interphasic OrganismInterplanetary AllianceInterstellar Plankton
Intersystem UnionInusannonInuwashi Gunjin
InverseInvertroidInvid
Ion EelIotianIotran
Ipharian-Da'LorIphiginiIraquinik Confederation
IrathientIraxIrhennian
IrianIridescent Flint BeetleIrkburgle
IrkenIrken EmpireIrnakk
Iron GiantIron GolemIronak
Ironclad WhaleIrrasianIrrukiine
IshIshaIsha Awak
Ishi TibIskalloniIskani
IskoortIsle of the DeepIsolus
IssoriIsticianIt
It (It! The Terror From Beyond Space)ItalbosiIthenite
IthorianIthullanIum
Ivrooy CoralIwadamaIwagen
Ix'IdarIxionIxll
IxtlIyaaranIyra
J'Onn's SpeciesJ'naiiJ-23 native
J-RodJababianJabori
Jack-O-LanternJack-lizardJack Jeebs' species
Jack Ketch TreeJackal MastiffJackworm
Jacob RowlinJade Chime SingerJaffa
JaffeeJafteeJagaroth
JahSeppJaig'alaarJain Technology
JairJakabirdJake Sully
JakelianJalavash WormJallian
Jam PonyJandoonianJanice (Robotech)
JanisiJanissaryJante (Species)
JardaanJarellJarencat
JargonianJaridianJarra's species
JarrettJasperJaspforran
JastaalJathroJatravartid
JavelinJawaJax (clone Cadet)
Jax the ConquerorJayceJazbinan
JediJeff (Men in Black)Jehetma
JekuulJellienJelly-bladder Plant
JellyblimpJellyfloatJelzap
Jem'HadarJemat's SpeciesJenet
JenovaJentekJerni
JerrilekanJerrotoJesse
JetdarterJetrayJevesect
JevonJezekJhazallan
JhefJigglypuffJikiro
JillsarianJilruanJimmy (Jeff and Some Aliens)
JimvuJindaJinn (Jinnrise)
JinniJiralhanaeJithna leaf
JitterbugJo-adianJock-Xenomorph
John (Taken)JokaeroJokhalli
JoozianJophurJorenian
JostranJotanJotok
JotusJoustmiteJovian
Jovian (Destiny)Jovian (Doctor Who)Jovian (Not Final!)
Jovian (Space Patrol)Jovian (Superinteressante)Jowlpreener
Jubba-JubbaJubba BirdJubilee Beetle
JudgementitesJudoonJulian Sloane
Julian deVascez's speciesJumba JookibaJumerian
Junction LizardJungle FelucianJungu
Junior's speciesJunkerJury Resplendent
Juryrigg's SpeciesJuzzianK'aarg
K'aitianK'kartK'la'bisian
K'lor'slugK'oh KajanianK'tang Kaktorri
K'yipsasK-SeriesK-Tron
KCO2Ka'hrenKa-Ma
Ka AnorKa Po' TunKaadu
KaaliumKabeKabel1 alien
KabierounKablatKadmier
KadriansKaferianKafit
KaftidKagoKagouti
KahlerKahler-TekKahori
Kai TokKaidanKaiden
KaijuKaiju (Pacific Rim)Kaiju (Samurai Jack)
Kaiju (The Troop)Kaiju SkinmiteKakarot/Goku
KakaruKakliosaurKakori Punctatus
KakureimoKal'Tik'MaKal-El
Kal-taarKalaaniteKaldane
KalderanKalduuKaled
KaleeshKalgerosKaliman Retriever
KalinchaKalishKalkar
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