|Series||Ben 10: Ultimate Alien|
|Nano Item||Crystalline Projectile|
|Voiced by||Dave Fennoy|
The FutureIn the future, Tetrax is nowhere to be found. He was either defeated in battle, or fled from Earth to escape Fuse's tyranny.
Tetrax is onboard Mandark's flying research facility within The Darklands alongside Samurai Jack. He is helping study the plans of Fuse, such as the weapons made of his monster's remains and super charged Fusion Matter. He is normally seen with his helmet off, but uses it in his idle pose.