Now we move over to the second kaiju of the aliens faction and one who has clashed against the king of monsters many times throughout different movies. Like Godzilla he to has different versions of himself who are differently in power scale and has three heads as well.

King Ghidorah (Showa)

Classification: Extraterrestrial Three headed dragon

Powers and abilities: superhuman physical characteristic, flight, energy manipulation(Energy projection and energy absorption, through his skin), large size(type 1), natural weaponry(teeth), breath attack, gravity manipulation, air manipulation, poison manipulation, self-sustenance( type 1 and 2), transformation(Meteor form), extrasensory perception, madness manipulation, magnetism manipulation(All explained here and here)

Attack potency: Small Country level(Second generation ghidorah is comparable to gigan, fought with Zone fighter)| At least Small Country level(King Ghidorah once shook Venus according to the officials guide books, that would yield this much energy. He has taken energy away the Sun shine with a prism, he also turned Venus that was a planet full of life like Earth, into a dead planet in a single day. Causally defeated a Mothra larvae. He fought with Showa Godzilla, anguirus, rodan and Gorosaurus simultaneous)

Speed: Sustainable Movement speed(Outpaced Anguirus and Godzilla), Massively FTL attack, reactions, combat and flight speed(Capable to flight this fast in the vacuum of space, react to zone fighter and attack him in the middle of the fight).

Lifting strength: Class M(Superior to Godzilla who lifted and threw kaijus with his own weight, threw anguirus who weights as much as himself)

Striking strength: Small Country level

Durability: Small Country level

Stamina: Extremely high

Range: Tens of meters by sheer size, hundred of meters with energy attacks

Standard equipment: Teeth, tails

Intelligence: Animalistic

Weakness: Rather slow in the Earth atmosphere

Notable attacks:

Gravity beams: King Ghidorah trademark attack. He can fire gravity beams from his mouths. He can use both to destroy targets and pick them up.

Hurricane winds: King Ghidorah can cause wind storms with his wings.

King Ghidorah (Grand), Grand King Ghidorah

Classification: Three headed dragon

Powers and abilities: superhuman physical characteristic, light manipulation, all previous abilities stated, gravity manipulation, forcefield creation, electricity manipulation, can teleport beings smaller than himself, mind control, able to create a dome that allows objects to pass through and has a corrosive effect when they try to leave.

Attack potency: Small Planet level(Nearly killed a weakened rainbow mothra)| At least Small Planet level(Stomped rainbow mothra)

Speed: Supersonic + Flight speed

Lifting strength: Class M

Striking strength: Small Planet Class(Shredded mothra wings)

Durability: Small Planet Level, regeneration made him hard to kill| at least small planet level with forcefield

Stamina: High|Extremely high

Range: Extended melee range due to sheer size

Standard equipment: teeth, claws and tail

Intelligence: average

Weakness: none notable

King Ghidorah (Keizer or Monster X)

Classification: Three headed dragon

Powers and abilities:(Monster X)

All previous abilities stated, martial arts, energy projection, natural weaponry(tail), large size(type 2), energy manipulation, transformation(Keizer)

Attack potency: Small Country level(Stalemated Godzilla, who destroyed his meteor form),, At least significantly stronger than before and causally overpowered godzilla base form)

Speed: Superhuman, Sub-relativistic attack speed, reactions and combat speed(Can react to Godzilla atomic breath which is this fast, and his attacks are comparable to speed)

Lifting strength: Class M(Lifted Final Wars Godzilla, who weights 55,000 metric tons)

Striking strength: Small Country Class(Physically injured final wars godzilla)

Durability: Small Country level

Stamina: Extremely high

Range: Tens of meters due to sheer size, hundreds of meters with range attacks

Standard equipment: none notable

Intelligence: Average

Weakness: None notable

Keizer Ghidorah 

Powers and abilities: All previous powers plus flight, telekinesis, gravity manipulation and energy absorption.

Attack potency: Small country level

Speed: Superhuman

Lifting strength: Class M

Striking strength: Small Country Class

Durability: Small Country level

Stamina: Extremely high

Range: Tens of meters due to sheer size, hundreds of meters with ranged attacks

Standard equipment: None notable

Intelligence: Average

Weakness: Energy absorption has its limits and can hurt keizer ghidorah if too much energy is channeled at once.

Ghidorah (Anime)

Classification: Three headed dragon

Powers and abilities: (weakened)

Previous abilities stated, enhanced senses, large size(type 3), immortality(type 1), flight, electricity manipulation, body control

Attack potency: At least Large Star level(Ghidorah neck extending from the black hole has been observed as an anomalous mass rather than a singular point, indicating he is at supergravity mass that surpass the mass of the black hole he can create, which can causally have various solar masses. Confirmed by his official bio that ghidorah had eaten and destroyed thousands of planets in the past. Comparable in power to Godzilla Earth)

Speed: Supersonic +

Lifting strength: Unknown

Striking strength: At least Large planet class

Durability: At least large planet level

Stamina: Extremely high

Range: 20 kilometers by virtue sheer size

Intelligence: High, ghidorah has the capacity to communicate with Exif clergy through a technology called Gematron calculation.

Weakness: Relies on the Exif priest and the sacred stone to achieve 4-dimensional powers if said priest is killed or the stone is destroyed, ghidorah will become a 3-dimensional being.

True form(powers and abilities: All previous abilities stated before with also higher-dimensional existence(King ghidorah himself is a higher dimensional entity capable of interaction physiology. King ghidorah cannot physically interacted with unless its Exif guide is incapacitated or killed), non-corpeal(ghidorah body is made of pure energy with no true physical form), reality warping, animated shadow, portal creation, resistance to black holes.

Attack potency: Large planet level(Ghidorah necks extended from the black hole has been observed as an anomalous mass rather than a simply point.)

Speed: Supersonic +

Lifting strength: Unknown

Striking strength: Large Star Class

Durability: Large Star level

Stamina: Extremely high

Range: 20 kilometers by virtue size, hundreds of meters with ranged attacks

Intelligence: High

Weakness: Relies on priest or stone to stay alive.

King ghidorah (Monster verse)

Classification: three headed dragon

Powers and abilities: all previous stated

Attack potency: At least Country level(Easily overpowered Godzilla and superior to Muto prime)

Speed: At least Superhuman

Lifting strength: At least Class M

Striking strength: Country Class

Durability: Country level

Stamina: Extremely high

Standard equipment: none

Range: Several hundreds of meters due to sheer size

Intelligence: Average

Weakness: none notable

King ghidorah (Shin)

Classification: three headed dragon

Powers and abilities: superhuman physical characteristic, flight, energy manipulation, energy projection, energy projection, large size(type 2), breath attack, gravity manipulation, air manipulation, electricity manipulation, attack reflection, weather manipulation, natural weaponry.

Attack potency: Small City level+(Shin Ghidorah obscured the entire sky to the horizon creating a massive storm)

Speed: Subsonic speed

Lifting strength: Class M by sheer size

Striking strength: Small City Class+

Durability: Small City level+( Shrugged off point blank blasts from godzilla atomic breath who was equal to his own gravity breath attack)

Stamina: Very high

Range: Tens of meters due to sheer size, hundreds of meters with ranged attacks

Standard equipment: tails

Intelligence: High animalistic

Weakness: His hide is resistant to heat enough to survive shin godzilla radioactive ray flow, his insides are somewhat more vulnerable.

King Ghidorah (GMK)

Classification: Three headed dragon

King ghidorah, thousand years dragon

Powers and abilities: all previous abilities stated before, flight, breath attack, forcefield creation, gravity manipulation

Attack potency: City level(Fought with GMK godzilla, should be comparable to the other two guardians monsters)| City level(Absorbed mothra energy and added it to his own)

Speed: Supersonic

Lifting strength: Class M

Striking strength: City Class

Durability: City level

Stamina: Extremely high

Standard equipment: Teeth

Intelligence: Average

Weakness: Is to young and he is not fully grown

King Ghidorah (Heisei)

Classification: Three headed dragon

Powers and abilities: superhuman physical characteristic, flight, energy manipulation, energy projection, energy absorption, large size (type 2), breath attack, gravity manipulation, air manipulation, electricity manipulation and natural weaponry(teeth)

Attack potency: Planet level(Fought the same godzilla that would later go on to fight Mothra and Battra. Should be at least comparable to battra and mothra individually, if not stronger, as he was able to overpower godzilla by himself, a feat that battra and mothra had to team up to accomplish

Speed: Superhuman

Lifting strength: Class M

Striking Strength: Planet Class

Durability: Planet level(Shown to be unaffected by godzilla normal atomic breath attacks, and was only defeated by his stronger blue spiral breath)

Stamina: Extremely high

Range: Tens of meters due to sheer size, hundreds of meters with range attacks

Standard equipment: Teeth, tails, computer system

Intelligence: Animalistic

Weakness: None notable

King ghidorah (Monster strike)

Classification: three headed dragon

Powers and abilities: (base)

all previous abilities stated, large size(type 2), enhanced senses, self-sustenance(type 1 and 2, can survive the vacuum of space without food, water or oxygen, pressure of the bottom of the ocean), immortality(type 1), homing attack, energy projection, energy absorption, energy manipulation, electricity manipulation, absorption, aura, non-physical interaction(King ghidorah can interact with non-corpeal beings like ghost, also he is able to interact with life force), transmutation, reactive evolution, natural weaponry and elemental manipulation, flight,(Resistance), Resistance to to erasure, fire(Can resist fire), electricity, matter manipulation, destruction/absolute zero cannon) 

Attack potency: At least Universe level

Speed: At least speed of Light travel, reactions and combat speed

Lifting strength: Class M by sheer size

Striking strength: At least Universe

Durability: At least universe level

Stamina: high|Extremely high

Range: Tens of meters by sheer size, at least Stellar to Interplanetary with ranged attacks

Standard equipment: Claws, teeth, wings and tail

Intelligence: Average

Weakness: Dark-based attacks

Mecha- King Ghidorah

Classification: Extraterrestrial Mechanic three headed dragon

Powers and abilities: superhuman physical characteristic, flight, energy absorption, energy manipulation, energy projection, large size(type 1), breath attack, heat manipulation, ice manipulation, gravity manipulation, self-sustenance(type 1 and 2), inorganic physiology(type 2)

Attack potency: At least Small Country level(Fought with Showa Godzilla)

Speed: Subsonic travel speed on land

Lifting strength: Class M

Striking strength: At least Small Country Class

Durability: At least Small Country level

Stamina: Extremely high

Range: Tens of meters due to sheer size, hundreds of meters with energy attacks

Standard equipment: none

Intelligence: Average

Weakness: None notable