Ultroid Zero (ウルトロイドゼロ,Urutoroido Zero) is a man-made Ultraman and Anti-Monster Robot created by GAFJ's SAAG, having most of its aspects based on the Ultras that have visited Earth and King Joe STORAGE Custom. It is characterized as The Strongest Robot Weapon (最強ロボット兵器,Saikyō Robotto Heiki). Yoko Nakashima is designated as its pilot.
Its true purpose is apart of Celebro's Civilization Self-Destruction Game, in which Ultroid Zero would be used to create Destrudos and annihilate the intelligent lifeforms of Earth.
Subtitle: Special Airborne Armor-4 (SC-4) (特空機4号,Tokkū-ki Yon-gō, lit. Special Aircraft #4)
D4 Ray (Ｄ４レイ,Dīfō Rei): The dimensional destruction weapon attached to Ultroid Zero's chest. It utilizes the completed version that is controllable after the analysis of Z's Zestium Beam which is able to prevent dimensional collapse. Its firing stance is akin to Ultraman Zero's Zero Twin Shot.
Magnerium Gatling (マグネリュームガトリング,Maguneryūmu Gatoringu): A powerful 4-barreled 35mm multi-barreled rotary cannon fired from the arm.
Magnerium Blade (マグネリュームブレード,Maguneryūmu Burēdo): Ultroid Zero's high frequency melee attack blade to slash and damage enemies.
Magnerium Shield (マグネリュームシールド,Maguneryūmu Shīrudo): Ultroid Zero creates an energy barrier and prevents any attack.
Magnerium Slasher (マグネリュームスラッシャー,Maguneryūmu Surasshā): Medium-range multi-purpose high-energy cutters from the corners of the head that fire blades of energy to cut through the enemy.
Magnerium Maser (マグネリュームメーザー,Maguneryūmu Mēzā): A powerful light beam emitted from Ultroid Zero's forehead.
