When Lucemon got a handle, for the first time. of Nexus his insanity drove him to destroy reality 08. Reality 08 was none other than the X-Evolution world not too longer after being resetted by Ominmon X.
The destruction was almost instant, the X-Evolution reality was no more.
Except that Tokomon X survived.
And so did Yggdrasil which, in the last minute, before being given the final blow by Ominmon X managed to send part of his codes to the neighboring human world. His codes traveled through the net and ended taking possession of a google boy called Takeshi who was just playing a videogame at that time. Takeshi became one with Yggdrasil but before he could fully understand what´s going on he was drawn to the Digital World. There he was greeted by the newly digivolved Tokomon X, now Patamon X which declared that from now on he was is partner. Takeshi was supposed to be given a mission about stopping a lingering corruption in the new Digiworld but Lucemon´s antics in Nexus caused the entire reality to collapse !
The dormant Yggdrasil then activated its powers and both Takeshi and Patamon X were teleported in the nick of time. When the pair finally opened their eyes they would find themselves in another Digiworld and inevitably dragged to a new adventure…