The Old Clock Store Owner explains that to defeat Quartzmon one of the Digimon Hunters must prove him/herself stronger than all the others to obtain the Brave Snatcher, what remained of Bagramon, and infuse it with the powers of Taiki and the five Legendary Heroes from other time-space universes who saved their respective Digital Worlds. Before sending Tagiru, Ryouma and Noboru's teams, and a few other hunters to a separate dimension, the Old Clock Store Owner gives Akari and Zenjirou their own Xros Loaders so they and the reformed Xros Heart United Army can help keep Quartzmon at bay. Finding themselves fighting an army of Myotismon clones which emerged from Quartzmon, Xros Heart forms Shoutmon DX, XrosUpBallistamon with Deputymon, XrosUpDorulumon with PawnChessmon, XrosUpTsuwamon with SuperStarmon and XrosUpMervamon with Beelzemon. The fight takes turn for the worse when some of the Myotismon digivolve into MaloMyotismon and a group of VenomMyotismon. Just when the children are about to be defeated, Marcus and his Agumon appear with Tai and Agumon, Davis and Magnamon, Takuya, Takato and Guilmon. Tai's Agumon Warp Digivolves to WarGreymon, while Marcus' Agumon Double Warp Digivolves to ShineGreymon. Takato and Guilmon Biomerge to Gallantmon, while Takuya Fusion Evolves to Aldamon. Soon, Magnamon runs out of energy and becomes Veemon, at which point Ken arrives with Stingmon, soon followed by Matt and MetalGarurumon and the rest of the Legendary Warriors. Veemon and Stingmon immediately DNA and then Mega Digivolve to Imperialdramon, while WarGreymon and MetalGarurumon DNA Digivolve to Omnimon and Kumamon and the other Legendary Warriors fuse with Aldamon to Ancient Spirit Digivolve to Susanoomon. Grani then appears and fuses with Gallantmon to become Gallantmon Crimson Mode, while Marcus upgrades ShineGreymon to ShineGreymon Burst Mode. During the battle, Marcus and ΩShoutmon help fight some of the MaloMyotismon, while Imperialdramon assumes his Fighter Mode in order to finish off the VenomMyotismon. Meanwhile, the other hunters step down from the dispute of who is the ultimate hunter with Tagiru and Ryouma fighting for the position. After Ryouma emerges the victor, he succesfully obtains the Brave Snatcher. However, just as the six heroes prepare to fight with Ryouma and Astamon to defeat Quartzmon, Ryouma suddenly knocks down Taiki and ΩShoutmon using the Brave Snatcher while revealing that he is actually allies with Quartzmon, whose true plan is mass genocide of humanity and making DigiQuartz the new human world.