A fake GoShogun mecha deployed by Yattar Ra Kel'Nagul in the 23rd episode of the manga, "Rampaging Good Thunder". Its official name is "Sengoku Terror God Go'Nagul".
Like the real thing, it can store three fighter planes (it is unknown whether it has a pilot or not). It is equipped with a fake space bazooka, the "Nagul Bazooka", which is just as powerful as the real thing.
When Good Thunder's teleportation device goes out of control, it torments GoShogun, who is unable to use most of its weapons, but after being hit by the Go-Flasher Special, it awakens to its own ego and commits suicide, ashamed of its destructive actions.