Groribas (グロリバース, Guroribāsu) was one of the Alien Invaders who attacked A-City.


Groribas is an alien with a large imposing body. Its head and hands consist of eyeless mouths with rows of long sharp teeth. His head has a spiky dog collar around his neck.


Groribas was briefly shown, but in that brief appearance he displayed great confidence in his own battle prowess. He showed a somewhat goofy personality, not being able to decide which 'moves' to use in a fight.


Hero Association SagaEdit

Alien Conquerors ArcEdit

Groribas briefly appeared in a futile attempt to stop Saitama from damaging the ship further. While touting his own abilities, his head was blown off by Saitama's punch.[2]

Abilities and PowersEdit

Due to his status as a dragon-level threat, it can be assumed he is a fairly powerful being. Along with Geryuganshoop and Melzargard, he is one of the strongest fighters of the Dark Matter Thieves after Boros.

Physical AbilitiesEdit

Acid Breath (アシッドブレス, Ashiddoburesu): Groribas claims to have an acid breath that can melt anything, but this is not shown due to the speed at which he is dispatched by Saitama.

Fighting StyleEdit

Expert Hand-to-Hand Combatant: Groribas possesses multiple techniques which he wasn't able to show off, due to his quick death by Saitama. Given their names, it can be assumed that he preferred hand-to-hand combat. He stated he would often kill his opponents too quickly before he could display all of his techniques.[3]

  • Double Bite: Groribas attacks with both arms at once. The effect of this move was never seen.
  • Purgatory Thorn Grip: One of Groribas's many moves that he did not get to display.
  • Sky Strangle Sunder: One of Groribas's many moves that he did not get to display.
  • Screw Tail Thrust: One of Groribas's many moves that he did not get to display.

Major BattlesEdit

Participants Chapter(s) Episode(s) Result
Groribas vs. Saitama 32 10 Groribas is killed


  • Groribas's name is a possible pun of Guro (グロ), a shorten form of "grotesque" in Japanese and Reverse being often used to refer "vomiting" in Japanese.
  • Murata states that if Melzargard, Groribas and Geryuganshoop work together to fight against Orochi, even with preparation, they have almost no chance of winning.[4]


  1. 1.0 1.1 One-Punch Man Encyclopedia; One-Punch Man: Hero Perfection, page 158
  2. One-Punch Man Manga; Chapter 32, page 53
  3. One-Punch Man Manga; Omake (Volume 6)
  4. One-Punch Man Stream; 2/6/2018