There were two battles going on, one on the rooftops of the castle and the other on the grounds below.
BlackGreymon roared out as he used his Flame Breath, which was cancelled out by ShamanVeemon's Purity Barrier, which protected both her and KnightGreymon from the inferno.
"Veemon, you've got some moves for a new Mega Digimon." Rika said, impressed.
"Thank you but we need to strike before he breaks the barrier." ShamanVeemon told her Tamer in reply.
"Then allow me. Courage Blade!" KnightGreymon then announced, before he then stood beside her and fired a beam from his sword, striking through the barrier and flames, striking the Black Digimon.
-Around the same time-
Up on the roof, Guilmon and BlackGuilmon exchanged blow after blow, cancelling each other's attacks out.
Seeing they were evenly matched in close combat, Guilmon then leapt forwards, catching BlackGuilmon off guard and kicked him in the stomach.
However, it wasn't enough to faze him, as BlackGuilmon suddenly struck Guilmon back by punching him on the face.
As they fought, Renamon slowly began to stand, regaining more of her strength and determination to keep Guilmon safe, making her rise to her feet and approach the dragon duo.
Continuing to fight, Guilmon and BlackGuilmon then punched each other in the face before both flew straight into opposite walls and crashed.
Guilmon re-emerged first and then saw BlackGuilmon emerge afterwards, making the red dragon Digimon growl in frustration, before he and BlackGuilmon were surprised when Renamon landed by Guilmon's side.
"Guilmon, I am ready to help fight again." She told him, making Guilmon ask as he rose to his feet. "Are you sure?"
"With you by my side, I am more than sure." Renamon said in reply, smiling at her love, who smiled back.
"So the hero and his princess reunited? Still, you think two against one would do any good against me?" BlackGuilmon questioned.
"We'll find out won't we?" Guilmon told him as he and Renamon rushed into battle.
-Back below-
"Lightning Staff!" ShamanVeemon called out as she twirled her staff around and slammed it in the ground, causing a powerful lightning bolt to strike through the ground and shoot at BlackGreymon, who jumped out of the way of the attack.
"You two brats! Fire Horn!" BlackGreymon yelled, as he fired a blast of energy from his horn, only for ShamanVeemon to gracefully dodge the attack.
With ShamanVeemon out of the way, KnightGreymon was ready to end the battle, to which Takato then asked from within. "Agumon, you ready?"
"I am." Agumon replied, before he and Takato focused all their power through KnightGreymon, who let out a powerful roar.
"Heavenly Slash!" KnightGreymon exclaimed as he charged at BlackGreymon and sliced through the middle of him, causing BlackGreymon to yell out in agony as his body begin to split in half, before he too was defeated, leaving one last evil left to destroy.
"I can't tell who is stronger, Sakuyamon or this new form." ShamanVeemon said to KnightGreymon, who nodded in reply. "Same with me or Gallantmon. But we still have one more battle to come."
-Back atop the castle-
Guilmon and Renamon fighting together was more trouble than BlackGuilmon thought, as he couldn't keep up with both of their attacks, in which Guilmon and Renamon kept bombarding BlackGuilmon with attacks and leaving him open to further damage.
"Pyro Sphere!"
"Diamond Storm!"
Both of their signature attacks struck BlackGuilmon, making him crash to the ground once again, which angered and annoyed him further.
And BlackGuilmon then groaned when KnightGreymon and ShamanVeemon joined them.
"Oh hey, you guys won fast." Renamon commented, making ShamanVeemon nod and say in a relieved reply. "I'm just glad you're safe."
However, their reunion was put on hold when BlackGuilmon stood up, panting heavilly.
"You're all what's left of the Black Digimon, BlackGuilmon. You cannot win against us." KnightGreymon told him.
But to their confusion, BlackGuilmon just began to laugh.
"So I am. But now... I think it's time I show you all real fear." He replied, before suddenly calling out. BlackGuilmon Dark Warp Digivolve to..."
And with that, the sky then turned dark, while BlackGuilmon was consumed in darkness.
Guilmon, Renamon, KnightGreymon and ShamanVeemon watched as BlackGuilmon's form began to twist, reshape and expand, taking on a new form of Gallantmon, only this Gallantmon had dark armour and radiated with an aura of pure evil.
"ChaosGallantmon!" He exclaimed, slamming his Balmung Spear into the ground, which created a powerful shockwave, forcing the heroes to shield themselves.
"His power is unbelieveable!" Takato commented in a shocked tone.
"Behold, the true power of the Black Digimon. This is the amazing power of ChaosGallantmon!" ChaosGallantmon announced, before he called out. "And this is of them. Chaos Shot!"
He then fired a shot from his Gorgon Shield that hit Guilmon and Renamon, sending them crashing to the ground below the castle ruins.
"Guilmon!" Takato called out in concern.
"Renamon!" Rika called, matching the concern Takato had, but for her Digimon partner.
However, before they could react, ChaosGallantmon appeared in front of them and then slammed his Gorgon Shield against them with such force that it knocked KnightGreymon and ShamanVeemon into the air.
"Now it's time to end your miserable lives." ChaosGallantmon cackled as he held up his Gogon Shield, preparing to blast the KnightGreymon and ShamanVeemon into oblivion.
But before he could end them...
"Double Impact!"
"Spirit Strike!"
ChaosGallantmon was almost caught off guard, but avoided the two attacks allowing KnightGreymon and ShamanVeemon to crash to the ground beside where Guilmon and Renamon had landed.
Back with ChaosGallantmon, he then turned to see Beelzemon, MegaGargomon and a new Digimon that looked like Sakuyamon, only her armour was a darker shade of purple, while the rest of her clothing was pitch black, as was her hair.
"So you came at last. The other two and the traitor." ChaosGallantmon mocked, making the Dark Sakuyamon say back. "It's Kuzuhamon! I realised what you're doing is wrong. I am here to stop you along with my new mate, Beelzemon now!"
"And we won't let you destroy this world, not when we are here!" MegaGargomon added in a determined tone.
"So you say. Very well... I shall start with you three first." ChaosGallantmon said.
"Judecca Prison!" He then called out, firing a massive blast from his Bulmung Spear, which struck the three Digimon, making them cry out as they were thrown back by the sheer power of ChaosGallantmon's attack.
But they remained strong and charged at them.
-Meanwhile-
KnightGreymon and ShamanVeemon groaned out as they slowly awoke, their vision filled with the Gallantmon and Sakuyamon, who then helped their friends up.
"Darn it. How could he do this?" KnightGreymon questioned as he saw ChaosGallantmon dominating MegaGargomon, Beelzemon and Kuzuhamon, making him then say. "We've got to do something before we're history, along with the entire world!"
"I agree." ShamanVeemon said, before asking. "But what can we do? His power is unbelieveable."
"Sakuyamon, do you remember what BlackGuilmon said? He said your life source was the key to the Digi Crystal's true power." Gallantmon spoke up, before suggesting. "Well, why don't we use the crystal ourselves?"
Confused, Sakuyamon faced Gallantmon and asked. "What are you saying?"
"If your life source gives the crystal it's power than don't give up your life. Just unlock the Digi Crystals' power and then maybe we can achieve a new level of Digivolution. I learnt something from the Digi Crystal while I was in exile. If the Digi Crystal unlocks its full power, then we can become stronger that not even the strongest darkness could overcome. In other words, we may Bio-Merge with KnightGreymon and ShamanVeemon" Gallantmon told her in reply.
Hearing that, Takato asked. "You mean we can DNA Digivolve?"
"It's worth a shot" Rika said in reply.
Sakuyamon nodded in agreement with her Tamer, before she then walked over to Takato's backpack, opened it, took out the Digi-Crystal and held it close to her chest.
"All my inner power to unlock this crystal's true power... please, give us all the power you got so we can destroy the evil which threatens our peace and love. As the Princess of the DigiVixen Kingdom, this is my wish." She wished into it, causing the Digi-Crystal to glow in a pure white light, amazing Sakuyamon, Gallantmon, KnightGreymon and ShamanVeemon, while they all could feel their energy return and a great power to swell up within them.
As ChaosGallantmon has Kuzuhamon down on her knees, he noticed the glow and turned to see what was happening.
"The Digi-Crystal!" He yelled
"What are they doing?" MegaGargomon questioned, making Kuzuhamon smile and say. "Winning."
"Gallantmon..."
"KnightGreymon..."
"DNA Digivolve to..." They called together, fusing to becoming one new being that had gold armour, Gallantmon's helmet and KnightGreymon's cape.
And now wielded both Gallantmon's Gram lance and KnightGreymon's sword.
"KnightGallantmon!" He announced, prepared to use his new power to rid the Digital World of ChaosGallantmon and his evil.
"Sakuyamon..."
"ShamanVeemon..."
"DNA Digivolve to…" The females both called out, fusing into a single, sexy female figure that had Renamon's yellow fur, ShamanVeemon's hair, wore Sakuyamon's bra, armour and helmet and ShamanVeemon's loincloth.
"ShamanSakuyamon!" She called out after her fusion was complete.
Rika was seen inside ShamanSakuyamon and Takato was inside KnightGallantmon, But they were not alone.
Renamon and Veemon, with their Data showing, were inside ShamanSakuyamon, while and Guilmon and Agumon, their Data showing too, were inside KnightGallantmon.
"Amazing. Guilmon was right. When these two merge together, we got incredible power!" Takato said.
"Yeah and we actually see each other as well, despite us losing our skins." Agumon added.
"This feels amazing!" Veemon said as she looked at her body, making Rika nod and reply. "And now I think we can win with this new power."
"Guilmon, you're right! This is amazing!" Renamon smiled as she looked up, making Guilmon say in a serious tone. "Keep focused guys. This is where the real battle begins!"
Seeing the two new figures before them, ChaosGallantmon questioned in demand. "What is this!?"
"ChaosGallantmon. You tried to plunge this world in darkness and tried to destroy both worlds. But that is why you will lose today." ShamanSakuyamon said together.
"It's time for me to repent on what I've done by deleting your Data once and for all!" KnightGallantmon announced.
"So you four fused into two new beings. So what? You just showed me the Digi Crystal. All I have to do is delete you and take it for myself!" ChaosGallantmon commented arrogantly.
"We'll see about that!" ShamanSakuyamon said back as she then leapt in the air and yelled out. "Purifying Fire!"
She then slashed her staff in mid air to bring up a wall of fire that surrounded ChaosGallantmon, trapping him and actually harming him.
"Transient Lance!" KnightGallantmon announced as he then shot through the flames, unharmed, and thrust his lance into ChaosGallantmon's chest, causing him to fall back.
"I cannot believe they put their faith in the crystal to become like this." Beelzemon said, amazed.
"Rika..." Takato then said from within KnightGallantmon. "No matter what happens, I will always protect you."
Rika smiled at Takato's words, making her reply. "And I will protect you as well Takato. I won't let you fight alone."
"I promise we'd get married one day, Veemon and I am not gonna break that promise." Agumon told her.
"I am happy to hear that from your words, Agumon." Veemon smiled as she cried a little, happy that Agumon cared so much about her.
Renamon put her hand on her chest and told Guilmon in a heartfelt tone. "Guilmon... you are my true hero. I will forever stay by your side."
"And I protect you and look after you, my princess" Guilmon said in reply.
As they said that, the two fused Digimon glowed once again, making ChaosGallantmon question. "W... what are you're doing!?"
"Finishing you off!" ShamanSakuyamon said, before she then undid her bra-like armour, exposing some of her breasts, showing a light between them.
"Purifying Chest Fire!" She yelled out, unleashing her power.
"Double Justice Fire!" KnightGallantmon exclaimed as he brought his Gram Lance and sword together as the tips touched each other and charged up with a huge light aimed at ChaosGallantmon.
They both fired huge beams of pure energy that hit ChaosGallantmon, sending him flying into the castle, along with the attacks into the machine, which they planned to absorb the crystal from.
Unable to withstand such power, the machine exploded, taking ChaosGallantmon with it as he screamed and was deleted, before a huge white light engulfed the area.