By A Mystery Man Writer
So we can assume that Upgrade is a Hybrid being. : r/Ben10
Basically the Ultimatrix : r/Ben10
Ben 10, Overflows Ultimate Upgrade
ULTIMATE UPGRADE : r/Ben10
Did all of Ben's forms in the Ultimatrix have ultimate forms? : r
What changes would you make to Alien X-tinction? : r/Ben10, ben 10
Drawing every Ben 10 Transformation part 9, Upgrade : r/Ben10
Ultimate Upgrade (Remake) : r/Ben10
Ultimate Alien #9 Upgrade by MrMustart on DeviantArt
What do you think of this ultimate upgrade design? : r/Ben10
Ultimate Upgrade (TNO), Ben 10 Fan Fiction Wiki
Ben 10, Overflows Ultimate Upgrade