On the right, Godzilla roared and slammed his tail. On the left Kong also roared and beat his chest.

Both Titans charged towards Mecha-Ghidorah. Meanwhile, Goku, Vegeta and Trunks transformed into Super Saiyans and accelerated head-on against Frieza.

Holding out his hands, Frieza released Mecha-Ghidorah from his chains, leaving the cyborg to fend for himself. Frieza then fired lasers from his fingers. Goku and Vegeta dodged them, but Trunks, being the less-experienced fighter, was hit in the shoulder. Falling out of his Super Saiyan form, he plummeted towards the ground.

"Trunks!" Vegeta called, but he had other things to focus on. Yelling, he and Goku landed punches on either of Frieza's cheeks.

Angered, Frieza watched as both Saiyans screamed. Their auras turned from golden yellow to an azure blue.

"Are you ready to die at the hands of Saiyans with the power of gods again?" Vegeta mocked.

Frieza growled, launching a barrage of punches at Goku and Vegeta. The two godly Saiyans countered with strikes of their own.

Meanwhile, Godzilla and Kong struggled against the upgraded Ghidorah, who was stepping on the ape and firing his breaths at the reptile.

Noticing the Titans struggling, Trunks, who fell onto a street and was struggling to stand, fired a Masenko at Mecha-Ghidorah's leg. Roaring in pain, he lifted his leg off Kong, who was gasping for breath.

Angry, Mecha-Ghidorah looked down on the time traveler. His three heads slithered down to the ground like snakes.

"Crap, I'm toast. Sorry, Mai," Trunks weakly said.

Just as Mecha-Ghidorah was about to fire, his three faces were hit by something. It was so fast, Trunks could barely keep up.

"Trunks, are you alright?" a familiar voice asked. Turning around, Trunks saw a familiar face, one he valued greatly.

"Wow, thanks, Gohan."

Gohan, who transformed into his Ultimate form, reached his hand out to Trunks, who grabbed it without hesitation.

"Sorry I was late. I stayed behind for a bit to give a couple of Senzu Beans to the kids."

"How are we going to beat this? Cell, the Androids, even Zamasu and Black were one thing, but this is… This is something else," Trunks said sounding discouraged.

Placing his hand on Trunks' shoulder, Gohan reassured him. "We fight together."

By now, Godzilla and Kong both recovered. Godzilla fired his atomic breath, but Mecha-Ghidorah repelled the blast with his wings, deflecting the attack back to its sender. Kong tried to jump on Mecha-Ghidorah's back but was swiped away by the twin tails.

Determining Godzilla to be the bigger threat, Mecha-Ghidorah shot steel cables to restrain the king of the monsters. However, Trunks slashed the cables in a flash with his sword, freeing Godzilla.

Using his massive wings, Mecha-Ghidorah took to the skies. The humans fired bullets and artillery at him. But the cyborg beast flew so fast that he outran the hailstorm of shells coming his way.

Watching from below, Goku turned to Vegeta and revealed the Potara earrings.

"C'mon Vegeta, put your earring on."

"Why do I care about fusing?"

"Listen. If we don't, Frieza and that metal dragon will destroy the world! We might not be able to return back home.

"Then the world can die for all I care."

"Really? Even after Buu, Zamasu and Broly, you're still against fusion? Do you want Bulma and your sons to die here?"

Vegeta groaned. "Fine! Give it to me, now!"

Goku tossed Vegeta the Potara, and Saiyan prince scrambled to put it on his right ear.

"Let's just get this stupid thing over with."

"Great, thanks, Vegeta," Goku said, putting his Potara on his left ear.

The two flew towards each other, their stomachs touching.

At the Monarch facility, the humans picked up a strong radiation signature. At first, they believed it was another Titan, but it was…

"ALRIGHT! I am the fusion of Vegeta and Kakarot. Call me Vegito."

The light and radiation Vegito produced was enough to grab the attention of all three Titans.

Vegito sped towards Mecha-Ghidorah.

"C'mon, big guy. Let's see what you got."

Mecha-Ghidorah fired blasts from his mouth, but Vegito dodged them with little effort. He then crossed his arms and kicked each head in the jaw.

"You're making this too easy."

Bringing his fingers together, a large blade of energy extended from Vegito's hand. The sword was strong enough to slice Mecha-Ghidorah's tails off.

"You think that was bad? Then check this out. Vegito… Blue!"

Yelling, Vegito's aura turned to that of Super Saiyan Blue.

"Nothing can stop me now!"

Angered about his tails, Mecha-Ghidorah rushed towards the fused warrior. The right head lunged, but using Instant Transmission, Vegito appeared behind said head and kicked it. The impact was strong enough to knock the monster down and crashing into Tokyo below.

Everyone was astonished at Vegito's power. The Monarch facility was dead silent. Even Godzilla and Kong took notice.

"Wow… father and Goku are incredible together," future Trunks said. Gohan nodded.

Floating above, Vegito prepared for the final blow.

"Alright, playtime is over. I'm about turn you into molten slag. Final… Kamehame-"

Suddenly, Vegito felt a horrible pain. Looking down, he saw a hole in his chest. The attack was strong enough to knock him out of his Super Saiyan Blue form.

From behind and at the top of a skyscraper, Frieza fired a laser into Vegito's back that went through him, causing the fused warrior to separate into two again.

"Father! Goku!" Trunks yelled. In anger, he unleashed his Super Saiyan Rage form and charged against Frieza.

Godzilla and Kong attacked Mecha-Ghidorah. Kong threw cars and rubble, while Godzilla fired his atomic breath. Both knew that getting too close would mean disaster.

Trunks swung his sword down towards Frieza, but the villainous alien recovered enough energy to grab it with just his fingers. With ease, Frieza wrapped his tail around Trunks, choking him back to his base form, and tossed him off the building. He cackled.

"To think I would let that half-monkey slice me to bits again."

Gohan stood alone, the last line of defense between Mecha-Ghidorah and Mount Fuji.

"Ka…Me…Ha…Me…"

Mecha-Ghidorah fired all three of his breath attacks.

"HAAAAA!"

Gohan's Kamehameha met Mecha-Ghidorah's breaths halfway. However, he was rapidly losing the advantage, even in his Ultimate form.

Then, he heard a familiar voice next to him.

"Don't worry, Gohan. I'm here! Kamehame… Haaaa!"

Turning his head, Gohan saw his little brother as a Super Saiyan. He simply smiled, knowing he wasn't alone.

Even with Goten's extra firepower, it still wasn't enough to fight against Mecha-Ghidorah.

"Gohan! Goten!" Goku said. "Don't let up! Don't be afraid! Focus, and give it all you got!"

Behind and between them, Goku appeared with Instant Transmission. He used a Senzu to replenish his health, but the hole from Frieza's laser remained in his gi.

"Let's finish this, here and now!"

Goku transformed into Super Saiyan Blue. Not only that, but he called upon the Kaioken. His aqua blue aura was engulfed by another that was blood-red.

"Ka…Me…Ha…Me…HAAAAAAAA!"

Together, father and sons fired their signature attacks, each targeting a different head. Now, Mecha-Ghidorah was struggling, but he still held fast.

Weakened, but back on their feet, Vegeta, future Trunks and kid Trunks snuck from behind.

"Let's do this, father!" future Trunks said. Vegeta grunted in response. He then turned to the younger counterpart of his son.

"Remember what I taught you, son? In the gravity chamber?"

"Hmm? Oh, yeah, the Galick Gun!" the young Trunks said.

Getting into position, Vegeta and his sons each were behind one of Mecha-Ghidorah's heads.

"Now! Galick… GUNNNN!" Vegeta yelled, his sons after him. Now, Mecha-Ghidorah was taking three Kamehamehas in front, and three Galick Guns from behind. It had to have been only a matter of time now.