Terranadramon

Recolored version of Teranadros, which serves as the basis design of Terranadramon as to not let a design go to waste. This is also Teranadros's Shiny colors as well. Now then, the backstory behind this thing and the reason the original 8 Digidestined's Digimon have different final stages in B/C from the ones they had in the WonderSwan Titles. The whole backstory is basically all a big experiment by Dragoramon to test how much it could alter history and change other Digimon's evolution lines, as well as part of my explanation as to why they have different final stages when faced in B/C for the Legend Tamer battle. The story goes as follows:

The year 2010, Dragoramon wakes up from it's eternal slumber from the last few billion years. The human race has already been wiped out on Earth on the B/C universe at this point, and Dragoramon's body has drifted so far in space it ended up in the Adventure universe, 15 years after MaloMyotismon's destruction, from which it would begin experiments on this new world. It creates a duplicate of the invincible Terranadrosus and dubs the new creation Terranadramon, as this creation was now a Digimon. However, it's power was lacking, so Dragoramon used Yggdrasil's destroyed armor from the Data Squad universe, as well as what remained of Dexmon from the X Evolution universe to complete Terranadramon into a powerful being. It sends this mighty beast of a Digimon down to Earth in the Adventure universe to begin it's "invasion", but it is nothing more than a mere experiment.

T.K., Cody, Ken, Davis, Joe, and Mimi are the first to learn about Terranadramon's arrival, and as their Digimon digivolve to Vikemon, GranKuwagamon, Plesiomon, and Rosemon, they are defeated instantly and Terranadramon moves somewhere else to flee despite having defeated them. After the rampage Shakkoumon, DinoBeemon, Zudomon, and Lillymon discover they can no longer digivolve to Mega, another part of Dragoramon's tests was to take away their Mega Stages to see if he could force new ones onto them. Suddenly Dragoramon decides to appear in person to them, and the Digimon digivolve into different Mega stages than what they had before; Shakkoumon digivolves to GuardiAngemon, Dinobeemon digivolves to BlackImperialdramon, Zudomon digivolves to Vikemon, and Lillymon digivolves to Lotosmon. Dragoramon goes on to use Mimi as a puppet of sort to speak to them, saying "Your old Mega forms are no more. Embrace the future as everyone around you turns to dust", then Dragoramon disappears.

The Digidestined on alert now, they begin to worry about what Dragoramon had said. Suddenly many Terranadramon begin to attack major cities around the world, overwhelming other Digidestined easily. Dragoramon has made another part of the test though, in which if they can defeat a specific Terranadramon, they would be saved. This specific individual was closer to home than inticipated, as it was the one that attacked them first. Even with the combined forces of Omnimon, Imperialdramon Paladin Mode, HerculesKabuterimon, Phoenixmon, Valkyrimon, GuardiAngemon, Vikemon, and Lotosmon, this individual was extremely hard to defeat, for it's power was beyond Super Ultimate. It caused Omnimon to degenerate to WarGreymon and MetalGarurumon, and the final phase of Dragoramon's experiments went into play; To have WarGreymon and MetalGarurumon digivolve to VictoryGreymon and ZeedGarurumon.

With the encouragement of every human and Digimon in both worlds, both had digivolved just as Dragoramon had planned and destroyed the host Terranadramon, but nearly destroyed all of Tokyo in the process. Everybody was taken by surprise at the whole incident, with Izzy puzzled as to who or what Dragoramon is. Dragoramon returns to his universe to speak to his master, none other than the Grand One, with one final statement by the Grand One; "Mission Accomplished", and Dragoramon's goal of altering history was complete.