Now we will switch over the enemies kaijus factions starting with the aliens and the first one is gigan the duel scythes bladed kaiju.

 Gigan(Showa)

Classification: alien

Powers and abilities: superhuman physical characteristic, flight, cyborgization, energy projection,teleportation, infrared vision, explosion manipulation(Gigan hooks can release an explosion charge upon impact), fire breath, body control(seen here), transformation(diamond form)

Attack potency: Small Country level(Can causally attack with this much energy, comparable to Showa King Ghidorah, fought and overpowered Godzilla and was the first monster to cause godzilla to bleed profusely, completely overpowered anguirus, and defeated jet jaguar. After gigan was upgraded by the Garogas, he was able to fight a stronger godzilla showa and zone fighter)| Small country level(Fought on par with mothra, godzilla, comparable to monster X)

Speed: Supersonic movement speed

Lifting strength: At least Class M(Kicked the 20,000 metric ton showa godzilla dozen of meters with one kick and overpowered him for a awhile, superior to the 30,000 metric ton anguirus)

Striking strength; Small country class

Durability: Small country level

Stamina: Extremely high

Range: Tens of meters by sheer size

Standard equipment: none notable

Intelligence: Possibly Average(Capable of communicating with the other monsters and planning with other monsters, celebrated two opponents being stuck temporarily.)

Weakness: Striking his eye vision will either shoot out his eye laser, or blind him

Notable attacks:

Buzz saw: Gigan has a buzz saw on his stomach that he uses to saw opponents.

Teleportation: Gigan can teleport short distance to confuse his opponents

Diamond encasing: Gigan can encase himself within diamond, which is used to travel far distances areas.(Diamond form)

Hooked Appendages: Gigan can slash opponents with giant hook blades in zone fighter, he gains to the ability to summon small explosives.

Gigan (Final wars)

Classification: alien

Powers and abilities: all previous stated

Attack potency: small country level

Lifting strength: Class M

Speed: supersonic movement speed

Striking strength: Small country class

Durability: Small country level

Stamina: Limitless

Intelligence: average

Standard equipment: none

Weakness: If Gigan buzz saws comes back it will slice off his and making him being vulnerable to surprised attacks and lowering his defense. If his head is destroyed then he will longer be function in combat.

Gigan (Monster strike), Original form 

Classification: Alien

Powers and abilities: superhuman physical characteristic, large size(type 2), self-sustenance(type 1 and 2, can survive in the vacuum of space, pressure of the bottom of the ocean and without food or water for long period of time), immortality(type 1), homing attack, energy projection, manipulation and absorption, aura, gravity manipulation(Via the null gravity barrier), skilled in hand to hand combat, inorganic physiology(type 2), cyborgization(full), non-physical interaction(Gigan can interact with non-corpeal beings like ghosts, also he is able to interact with the life force), transformation, reactive evolution, natural weaponry and elemental manipulation(Gigan can control the element of water)

Attack potency: At least Universe level(Consistently portrayed as comparable to monsters who can destroy and/or create the universe)

Speed: At least the Speed of Light travel reaction and combat speed

Lifting strength: Class M by sheer size

Striking strength: At least Universe 

Durability: At least Universal level(Tanked blows from monsters on his level)

Stamina: Extremely high

Range: Tens of meter by sheer size

Standard equipment: Claws

Intelligence: Average

Weakness: Nature-based-attacks

Gigan (Modified form)

Classification Cyborg alien

Powers and abilities: superhuman physical characteristic, same as before plus statistics amplication(Physical power, ranged attacks, speed and durability amplification), rage power(The angrier Battra is, the stronger his attacks become), and flight| Resistance (Resistance to Existence Erasure, darkness fire(Can resist fire), electricity, matter manipulation(Resist the micro-oxygen, which breaks down most matter on a molecular level), Deconstruction/Absolute zero temperatures(Resisted Kiryu absolute zero cannon). 

Attack potency: Universal level

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

Lifting strength: Class M by sheer size

Striking strength: At least Universal

Durability: Universal level

Stamina: Extremely high

Range: Tens of meters by sheer size

Standard equipment: Claws

Intelligence: Average

Weakness: Natural based attacks