Horoboros

Horoboros (ホロボロス) is a mammalian Kaiju from Ultraman R/B. He is said to be a great monster with tremendous strength and agility.

Subtitle: Fierce Violence-Beast (豪烈暴獣)

Ultraman R/B
Recoiling from his defeat as Ultraman Orb Dark, Makoto Aizen knocked over his R／B Crystal Collection Case in a rage, only to immediately regret it and pick his crystals up, "apologizing" to them along the way. However, halfway through recovering them, he noticed Horoboros' crystal and smiled evilly as he picked it up, realizing that it could be his next great weapon against the Ultramen.

Makoto summons this monster during the Minato family's day off while trying to evaluate the Ultramen brothers' own performances in their fight. Horoboros managed to resist all finishers thrown by the Ultramen and knocks them out of transformation. Makoto took this opportunity to reclaim his Orb Ring NEO and transforms as he prepare to clean up his own mess. Orb Dark seemingly flaunts to monster, trying to look "cool" for the people while he fights. However, Horoboros later pins him down and Orb Dark had to end it by pulling a cheap move, putting it to sleep and then finishing it off with the Dark Origium Ray. After its defeat, its Crystal was picked up by Saki Mitsurugi.

After the defeat of Bezelb, Saki summoned the monster using her own Gyro, and it evolved into its Bipedal form. Horoboros quickly defeated Orb Dark, Rosso and Blu, leaving all three of their human hosts critically injured before Saki returned it to its crystal. Later, Horoboros was summoned by Saki again and Rosso and Blu fought yet another losing fight against it until Asahi Minato gave the Orb Ring NEO to her brothers, which they used to turn the tides of battle and they finally finished off Horoboros via the Triple Origium Ray.

Trivia

 * Horoboros' name is possibly comes from Horobosu (滅ぼす) and Ouroboros, a circular symbol depicted a snake (sometimes a dragon), eating its own tail, symbolising the cyclic aspects of nature and life.
 * Many fans have noticed a resemblance between Horoboros and Gukuru Shisa, due to them sharing a lion-like motif, suspecting to be a remodeled suit from Gukuru Shisa.
 * Their special attacks are even quite similar in nature: being a jumping slam.
 * Horoboros however combines both feline and canine motif, the latter being visible in its bipedal form and its roar is the howling of a wolf.
 * Originally, his debut was going to be in episode 11, according to the timeline of an early toy catalogue.
 * This is the first kaiju to defeat an Ultra without using any special powers or outside influence whatsoever (To the point of reverting them back into a human).
 * Although Red King seemingly accomplished the feat earlier in the series, he had the help of using Rosso's Splash Bomb against him.