Like Godzilla, King Kong is also an referring character that has made appearances in different movies and games as well including the new movie Skull Island Kong. I'm only going to be adding in two versions of him which is his first battle against godzilla and the own on skull island since he has evolved over time. 

King kong (Godzilla)

Classification: Giant Ape

Powers and Abilities: superhuman physical characteristic, large size(type 1), electricity manipulation and absorption, natural weaponry(sharp teeth), skilled in stealth, resistance to radiation.

Attack Potency: At least City level(Battled early years showa godzilla to a standstill) | At least Building level(Defeated Mecha Kong and Gorosaurus)

Speed: Subsonic

Lifting strength: Class M

Striking strength: At least City Class

Durability: At least City level(Tanked attacks from godzilla, was unfazed from godzilla atomic breath)

Stamina: Very high

Range: Tens of meters due to sheer size

Standard equipment: Teeth

Intelligence: Above Average(Kong has demonstrated remarkable intelligence, making use of environment objects like trees or rocks while fighting and devising methods of defeating opponents larger or more numerous than himself).

Weakness: none notable

Notable attacks:

Electrokinesis: King kong can absorb electricity. He can use this to make himself stronger and release surges of electricity from his hands.

Jaw breaker: King kong fatality move was he grabs his opponent jaw and rips it open. Performed it on Gorosaurus.

King Kong (Monster verse)

Classification: Giant Ape

Powers and abilities: superhuman physical characteristic, regeneration(At least low), immortality(type 1), natural weaponry(sharp teeth), enhanced senses, large size(type 1), stealth mastery, acrobatics.

Attack potency: Building level

Speed: At least Subsonic speed

Lifting Strength: Class M

Striking strength: Building Class

Durability: Building level

Stamina: Very high

Range: Tens of meters due to sheer size

Standard equipment: Giant rock

Intelligence: Below average

Weakness: He is still very young. His skin can be cut by the rotor blades of a helicopter.

Notable feats:

Easily destroyed dozen of helicopters

Killed the Mire squad with no effort

Took a flame explosion and recovered after a few moments

Took Ramarak down with brute force

Killed ramarak by ripping out his internal organs

Killed a giant octopus/squid by ripping its tentacles off and eating them.