Grantechtor (グランテクター Gurantekutā) was a prototype, but more powerful, version of the Cosmo Techtor model used by Zoffy/Andro Melos. It was created by the ancient Ultra Prometheus from Ultra Super Legends.
The Grantechtor was created ancient scientists of the Andro group which was later hidden beneath the North Pole on Earth.
Years passed and to combat the Guar Army gigantic robots, Gyeronia, Bemzn and King Joegue, Zoffy/Andro Melos flew to the Earth to retrieve the Cosmo Techtor and used it to defeat the monster robots. With all members of Guar Army defeated, the remaining leaders, Juda, Mold and Gina had no choice but to reform into Guar. Melos quickly used the Grantechtor for the last time and defeated the decrepit villain, at the cost of the armor getting destroyed as well.
- Strength Enhancement: The Grantechtor's main ability is to enhance the user's strenth, speed and performance.
- This is so far the only known armor that was destroyed in the series' run.
|Crest Weapons||Eye Slugger | Vezard | Maxium Sword | Zero Sluggers | Xlugger | Orb Sluggers | Geed Slugger | R/B Slugger|
|Bracers and Bracelets||Ultra Bracelet | Ultra Converter | King Bracelet | Stratos Edge | Armed Nexus | Mephisto Claw | Max Spark | Max Galaxy | Mebius Brace | Knight Brace | Ultra Zero Bracelet | Strium Brace | Ultra Fusion Brace | Taiga Spark | Plasma Zero-let|
|Armors||Protectors | Cosmo Techtor | Grantechtor | Arb Gear | Techtor Gear | Ultimate Aegis | Zero Slugger Gear | MonsArmor|
|Others||Ace Blade | Ultra Array | Ultra Magic Ray | Leo Nunchaku | Ultra Mantle | Giga Battle Nizer | Ginga Spark Lance | Knight Timbre | Orbcalibur | Orb Slasher | Geed Claw | King Sword | Giga Finalizer | Orb Dark Calibur | Orb Ring NEO | R/B Kourin | Taiga Tri Blade|