Xander Arvin
A boy who lived in both the "real" and the digital world, was givin the ability to transform into any Digimon he has in the Digitrix's database, He's witty, clever, good natured and heroic, but can be pretty cocky.

The Digitrix
The device that can allow him to turn into Digimon, there's no "Ultimates" since Digimon already evolve on a normal basis.
His current transformations:

Dracomon(Full Evolution Line)

Cyberdramon(One of his go-to Digimon)

Geogreymon

Rizegreymon(One of his Go-to Digimon)

Victorygremon

Wargreymon(One of his go-to Digimon)

Metalkabuterimon

Kendogarurumon(One of his Go-to Digimon)

Beowolfmon

Magnagarurumon

Magnamon

Growlmon

Wargrowlmon

Gallantmon

Imperialdramon(Fighter-mode) (His Go-to Mega level Digimon and personal favorite)

Omnimon(Uses him in times of emergencies)

Cannondramon

Blitzgreymon

(Don't worry, I'll add more Digimon later)