Subtitle: Advanced Guard Monster (尖兵怪獣 Senpei Kaijū)
- Height: 62 m
- Weight: 63,000 t
- Origin: Krea Nebula
After Alien Krea Shion came to Earth, Gyanzar appeared in a city causing a rampage. However, when Super GUTS tried to capture him in an electric field, Gyanzar seemingly disappeared. Gyanzar returned that night as he was summoned by Shion to destroy Super GUTS's base. After his right hand blew off, Gyanzar spawned a tentacle in its place and took down Shin's fighter, forcing him to turn into Ultraman Dyna. Dyna and Gyanzar battled with the hero having the upper hand and after Alien Krea's saucer was destroyed, the hero used a single shot of the Solgent Ray to destroy his monster. After the battle Dyna used the Water Stream on the forest fire caused by Gyanzar.
- Suit actor: Koji Mimura
Powers and Weapons
- Energy Blasts: Gyanzar can launch green energy blasts from his hands.
- Wound Tentacle: Gyanzar can spawn a long tentacle out of his wounds.
- Optic Blasts: Gyanzar can launch purple energy blasts from his eye strong enough to cause forest fires.