Location: Hollow Earth

Y/n has been jumping through Hollow Earth for the past two days and on his way he encountered many wonderful sights such as rivers, mountains and lush flowers. Now Y/n soon entered a dark, gloomy part of Hollow Earth.

Y/n: Holy hell, never saw this in Godzilla vs Kong.

Y/n walked through the cloudy Mountain ranges as he began looking for what Lupa told him, an insect infested cave.

Y/n: God knows how many fucking caves is in this strange ass Mountain range.

Y/n kept on looking around until he saw the setting sun.

Y/n: Probably got at least 4 Hours left before full moon, still haven't found this FUCKING CA- oh shit.

To Y/n's left, a spider probably as big as his foot crawled into a cave, dragging a very unfortunate grasshopper with it.

Y/n stepped on the spider and entered the cave before realising how vast it was inside.

Y/n: Holy shit.

His voice echoed to the depths of the cave and unknown to him, it attracted some unwanted attention. Y/n carefully tread deeper into the cave which made him gulp involuntarily as it got darker and darker but luckily he had nocturnal vision, allowing him to see in the dark.

Scuttling was suddenly heard infront of him which made him stop and get into a fighting position.

The scuttling creature came into the light and revealed itself to be a massive scorpion.

Y/n: Damn, well time to fight!!!

The scorpion hissed at him and charged with its tail shooting out at Hulk as fast as lightning but Y/n sidestepped and grabbed it before planting his foot on its head, killing it.

Y/n: That was easy.

Suddenly, there was more scuttling and it came from all directions as Y/n looked around and saw more of the same scorpion surrounded him, there were probably at least 150 of them.

Y/n: Bring it on, then.

Y/n:

The scorpions all began to charge Y/n who didn't do anything until they got very close and that was when he unleashed his thunder clap.

The massive clap killed about half the scorpions around him as the rest flew back from the sheer force of the clap and it caused the rocks to collapse on the rest of them as the entire cave shook as if an earthquake was happening.

After a couple of minutes, the cave stopped rattling and Y/n grinned.

Y/n: That was fucking fantastic, now let's find these giant bugs.

Two Hours has passed since the fight with the scorpions and Y/n hasn't been able to find any other living souls within the cave as he went in deeper. Just as he was about to give up, he stumbled into an open area of the cave and in the darkness, lied a giant spider probably twice his size.

Y/n: Alright let's... wait a second.

As Y/n got closer, he noticed the spider's eight eyes were lifeless and its abdomen was burst open as its guts were spilled all over the floor infront of it.

Y/n: What the hell? If this is the giant spider, then where's the...

Suddenly, loud scuttling was heard behind him and as he turned around, he could that in the darkness, was a 2000ft long Centipede with legs three times longer than him and pincers at least twice his size.

The centipede hissed at him while Y/n smirked.

Y/n: Let's do this.

Timeskip brought to you by The Olympics, when you want America to win and then you change your mind when you see Barcelona...

The Olympics... A man's dream paradise.

Back to the story...

Outside, the mountain housing the massive 2000ft centipede was very quiet until the entire mountain exploded.

Y/n was soaring through the air until he hit the ground hard from the blast, he looked up at the top and widened his eyes at the centipede.

The centipede roared and it echoed throughout the Hollow Earth and Y/n saw that the moon has risen and now shined on them.

Far Away...

The wolf pack were resting in the forest until they heard the roar of the massive centipede.

Scout 1: My Queen! The centipede has awoken!

Lupa: Get the wolves to safe-!

Suddenly, the roar of the Hulk resonated throughout the Hollow Earth and which made Lupa and Alteori breathe in relief.

Alteori: Seems like Y/n's challenging Bruticus.

Lycaon: Does he stand a chance? We couldn't make a dent on him with our whole pack!

Lupa: Hulk doesn't need a whole pack to do damage, he has the strength to do it.

Alteori: And if he wins?

Lupa: Then Hulk becomes the King of Hollow Earth.

Back to the Mountains...

Y/n roared in challenge to the mighty insect who happily accepted, thinking this was going to be easy. The centipede charged at him, scrapping massive amounts of dirt as it crawled towards it target. Y/n ran forward and jumped over its head before slamming his two feet on its head which made it hit ground in pain but not before it shook it off.

Running on its back, Hulk dug his fingers into an armor chink to try and rip a piece off but the centipede rolled and crushed him underneath its heavy weight. Getting back up, Y/n looked to see the jaws of the massive behemoth closing in which forced him to grab it and hold it back with all of his strength.

Bruticus: I am Bruticus, King of Hollow Earth and you are nothing!

Y/n grit his teeth as his muscles begin to burn but not before gaining an angry look on his face.

Y/n: You're no king... You are a puny insect.

Y/n ducked as he released the jaws and delivered a barrage of heavy punches to Bruticus's jaw which it roar in pain. Jumping back to extend the distance, Y/n picked a large boulder up and threw it at its head which bursted on impact as the centipede shook it off and charged again.

Bruticus had to be moving at over 600 mph so Y/n had to run and jump his way through the mountain range to avoid its deadly jaws. Like a battering ram, Bruticus tore through everything in his path, nothing and no one was spared. Y/n kept on jumping and jumping until the range gave way to a massive cliff drop that was covered in darkness.

Y/n came to a stop and faced Bruticus who grinned.

Bruticus: End of the line, rat.

Y/n: No this is where you die.

Bruticus charged at Y/n who tried to dodge but the centipede grabbed him and curled its lower half into a ball as he began to squeeze the life out of the Hulk.

Bruticus: Stupid Weakling.

Inside, Y/n tried to break out but the centipede was overpowering him, images of his previous life flashed before him before coming to a stop and Lupa and her pack.

Rage fueled him as he slowly began to overpower the centipede and his body exploded in green gamma radiation. The centipede released its grip and looked at Y/n.

Bruticus: You think some flashy green light will scare me, I AM KING!!!

The centipede charged again and Y/n roared as his eyes glowed green and oozed with gamma radiation.

Y/n:

All that was seen after that, was a massive gamma explosion.

After a few minutes, the explosion went away and the dust settled, all that was left of Bruticus was just an empty shell.

Y/n just looked at the corpse with hatred as he stomped his foot against the ground causing everything around him to shake, looked to the sky and roared more louder than before.

Y/n:

The roar not only echoed in Hollow Earth but on the surface and every titan heard it whether they were sleeping or not. A titan in the sea however did not take this roar seriously and will not accept him as a king.

He was the true King not this imposter.

He was the True Alpha of all Titans.

He was a God among mortals.

He... was Godzilla.