Subtitle: Evil God Beast (邪神魔獣 Jashin Majū)
Long ago, before the creation of the universe itself, "Grimdo" existed as the form of primordial chaos gods, who were sealed away on the ruins of Planet Volhes to maintain the balance of the universe, though ancient cosmic runes were left behind. There was similar writing in a cave on Planet Tiga-Du, where Ultraman Tregear and Ultraman Taro ventured to during their youth. After Tregear's fall to the darkness, he managed to decipher the ancient runes on Planet Volhes and unsealed the ancient chaos gods, who were absorbed into his Color Timer, granting him great power. Tregear covered his Color Timer with strong restraints to prevent Grimdo from escaping.
Ultraman Taiga The Movie: New Generation Climax
Grimdo was freed when the seal was loosened after the battle between Tregear and Taiga. Taro fought it but was possessed by the creature after performing the Ultra Dynamite. At some point, Grimdo leaves Taro after he is saved by Hiroyuki Kudo and the Tri-Squad, and is sealed within a barrier by the New Generation Heroes in exchange for their transformation abilities.
Grimdo escapes and wreaks havoc after devouring Tregear, whose body was falling apart after losing to Taiga. The New Generation Heroes fuse into Ultraman Reiga, who defeats Grimdo using the Reiga Ultimate Blaster.
- Designer: Masayuki Goto
- Height: 70 m (Freely set)
- Weight: 70,000 t (Freely set)
- Origin: Beyond space and time, sealed on Planet Volhes
- Powers and Weapons
- Grim Howling (グリムハウリング Gurimu Hauringu): A shockwave unleashed by roaring loudly.
- Grim Bolt (グリムボルト Gurimu Boruto): Grimdo can fire red lightning bolts through its horns and hands.
- Grim Ray (グリムレイ Gurimu Rei): A destructive beam fired from Grimdo's mouth.
- Energy Beams: Grimdo can fire yellow energy beams.