The sounds of clashes were heard through the castle area as Impmon, BlackRenamon and Renamon followed their eyes movement as both Guilmons were moving in great speed.

Then the two Guilmons reappeared and slammed their fists into each other, creating a shockwave of great force.

"The two are completely equal to each other." Impmon said, never experiencing such power from Guilmon before.

"And it seems like neither of them are backing down either." BlackRenamon added.

BlackGuilmon then leapt back and threw a kick at Guilmon, who blocked with his arm, before he retailed with a punch that BlackGuilmon managed to block as well.

The two exchanged punches and kicks, blocking the other out, until the two pulled back their arms and slammed their fist into the other's face.

Both then turned back to each other, their fists still on their faces, glaring at each other, before Guilmon then kicked his evil self into the stomach, causing him to fall and crash into the castle wall.

"Guilmon's amazing. I had no idea how much he improved these last seven days." Renamon said in awe.

"It's not over yet." BlackRenamon commented in reply.

BlackGuilmon then rose to his feet and slammed a punch on Guilmon's face, before flipping his tail to smack him back down to the ground.

Guilmon fell for a bit but landed on his feet and saw BlackGuilmon approach him again, to which Guilmon leapt out of the way and swung his tail to smack his dark self away, who landed on his feet too.

The two stared at each other, both seeing the hate for the other and their desire to defeat their enemy, before BlackGuilmon surrounded himself in a black aura, while Guilmon powered up with blue and red coloured aura.

"Well you have improved. You are certainly not a child anymore." BlackGuilmon commented, actually impressed by Guilmon's strength.

"You certainly are powerful alright, I admit it." Guilmon said, before stating. "But still, I am not going to lose!"

"I wouldn't be so sure. After I destroy you, I'll have no problem deleting your girl and your friends." BlackGuilmon said.

"We'll see about that. I may have a few surprises in store for you." Guilmon said back, determined to not only rid the Digital World of his dark doppelganger, but protect those he cared about.

Before long, the two charged again and both lifted a high kick, blocking the other's attack out.

"Come on, Guilmon, just delete him already!" Impmon called out.

'I'd love to, but he is stronger than I thought. This could take a while' Guilmon thought as both then leapt back.

Drawing on his dark power, BlackGuilmon then held his right arm out to his side.

"Blood Blade!" He announced as a dark energy formed into his hand, forming into a dark blood-coloured oversized blade with a red eye as he grasped the hilt.

"He summoned a sword!?" Renamon called out in shock.

With the dark weapon at his disposal, BlackGuilmon then charged again at Guilmon and brought his sword over his head, to which Guilmon managed to leap out of the way as the sword slashed down, creating a huge canvas in the ground.

Guilmon rose up and held his right hand out and announced in a strong tone of voice. "Pyro Sword!"

A flash of light then appeared as a crimson red oversized blade, with a Hazard mark on it, appeared in his hand.

"Guilmon summoned a sword of his own?" Renamon asked in surprise, amazed at what other power Guilmon had obtained.

BlackGuilmon rose and smirked, before saying. "Reduced to sword fighting I see?"

"You started it." Guilmon said as he took some swings from his sword with one hand.

Both Guilmons then charged and their swords clashed in a powerful lock, holding their blades in place.

They then clashed their swords against each other, back and forth, clash after clash, before BlackGuilmon leapt back from a slash Guilmon tried to execute in order to defeat him.

BlackGuilmon then charged again and brought his sword overhead, but Guilmon moved aside and sliced off his tail with his sword.

"Yes! He got him!" Impmon called out, while both Renamons cheered.

With the attack damaging his body, BlackGuilmon snarled, while Guilmon picked up his fallen tail and then threw it in the air and used his Pyro Sphere to destroy it.

"Sorry about that, but that will continue if you don't call off the evil right now." Guilmon told BlackGuilmon, who snarled, but then he smirked and then said in reply. "You know, reptiles like you and me shouldn't worry about that."

Guilmon realised what he meant as BlackGuilmon yelled as a new tail shot out from the remains and reformed in place.

"I knew it. Reptile Digimon like Guilmons can regrow their tails." BlackRenamon said.

"And just for that, I will end you right now. DARKNESS BLAST!" BlackGuilmon exclaimed as his sword began to glow in dark aura, before he aimed the blade at Guilmon, to which the sword turned into energy and fired a huge dark blast at him.

Guilmon held his sword in a defensive form as the blast hit him, causing a huge cloud of dust to emerge from where he stood.

"Guilmon!" Renamon cried out in concern.

BlackGuilmon smirked, thinking his strike had caused some damage, but then felt part of his mind snap at seeing Guilmon emerge from the blast, a little scratched, but not injured.

"You didn't think that would work? My turn now!" Guilmon said as he held his sword forward and huge flames appeared on the tip of his blade, which grew in size.

Bigger and bigger until it had reached a great size of power, Guilmon yelled. "Pyro Blaster!"

A huge wave of flames came from the blade, which were then unleashed from the blade and struck BlackGuilmon, who cried out as he was consumed by the flames and then crashed into the wall.

"He... actually did it?" BlackRenamon asked in awe.

BlackGuilmon rose from the cloud of dust, a bit burnt, but still showing he was alive.

"This isn't supposed to be happening! I am the strongest of all Black Digimon. There's no way a goodie-two shoes version like him could ever beat me!" BlackGuilmon snarled as he wiped something off his mouth,causing him to snarl again when he saw it was blood.

"Blood... a piece of trash like him draws blood from someone like me? This cannot stand!" BlackGuilmon yelled.

Guilmon stood as he glared at his enemy.

"Guilmon!" A familiar voice to the dino Digimon suddenly called out, before WarGreymon, MetalGarurumon, Flamedramon, OmniShoutmon, Arresterdramon and ShineGreymon leapt behind him and stood before BlackGuilmon.

"Guys! You're all alright!" Renamon called out in relief.

"Yeah. It was a hard battle but we won" OmniShoutmon said.

"BlackGuilmon, it's now six against one. You have lost!" Flamedramon stated.

"BlackAgumon and BlackShoutmon and all the others had been defeated?" BlackGuilmon asked, only to then smirk and cackle in amusement.

Then, from all the places where the Black Digimon had been defeated, black smoke emitted from each section and headed towards the castle.

BlackGuilmon opened his mouth and let the black smoke enter his maw and fill his body, as he then absorbed his evil follower's powers.

"Now you shall see something unimaginable." BlackGuilmon then said.

All of the heroic Digimon looked on in shock as a black energy sphere covered BlackGuilmon, watching as his form began to grow, expand and change.

"BlackGuilmon dark Digivolve to... ChaosGallantmon!"