Grayden (Japanese: ガトックス, Gatokkusu, Gatox, Korean: 가톡스, Gatokseu) are the ground rumbling mechbeasts of the Corrupted army. Infused with evil Tenkai Energy, these dog-like beasts rule the ground with the War Stallions, Hos, and Balthaz and attack the Corekai and the Tenkai Knights on command by the evil lord Vilius. They are shown to be a part of Vilius' army and are very loyal. They have many different powers they can achieve after being granted so by Vilius or by being infused with energy from the Tenkai Dragon, such as Robofusion.
- There is a toy of it, that when combined with Shadius (Rho), Balthaz, and Deviak, can form Triberus (Flying Darkwing Spector).
In the Series
A group of Grayden can be first seen in "Two Worlds", where they tried to attack Bravenwolf and Tributon, but were defeated by them.