When Kong looked up to the sky telling them that He finally avenge them then he saw the cave, so he went into the cave as he did some monkey bars and drops down.

As he fell he saw something familiar two lands were upside down and the rocks were floating, he was about to land but Kong falls adversely due to gravity then he landed on the ground. Kong checks around a new place it was known as Hollow Earth. He sprinted towards it then he saw, a skull with an Axe on it, he approaches the skull realizing the skull was Godzilla's Kind.

As he was about to take it. Warbat pushes Kong as he gained his balance. They glared at each other as Kong roared to step aside but, Warbat roared back. Realized that to take the Axe is to challenge or face the test.

Kong charged at Warbat as it did the same, Kong grabbed its throat and was thrown to the ground but Warbat whack its tail at Kong as he steps back then Warbat charged and bites his hand but Kong punch it unconscious then there was another one charging, he grabbed its tail and hits Warbat like baseball and one is unconscious Kong glared as proceed to jump kicking it's chin before he ripped it jaws out.

One remained left as it wrapped Kong tightly, Kong tried to break free, but no use. He got an idea, he bit Warbat as it screeches in pain giving Kong an uppercut to Warbat. Kong charged but Warbat pushes him, and Kong got up as he chest-beating and roars at Warbat then he looked at the Axe then Warbat charged, Kong wasted no time as he rush to get his axe then he picked it up and look at Warbat charging towards him.

Kong roared as he prepared his axe, he upper slice it and struck down right into its mouth, killing it. Kong roared triumph then it was interrupted by an atomic beam making a hole as Kong backed away, then he heard a huge roar.

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Kong recognizes the roar. It was Godzilla, calling him to take a challenge. Angered Kong roared as he check his axe glowing in blue. Then he goes to the surface, reluctantly accepting to challenge.