Many monsters appear in One Punch Man, but deciding who is the strongest among them is a difficult question. The reason is that no matter how strong someone is, if they face off against the strongest Saitama, they will usually be defeated with one punch, making it difficult to evaluate. With that in mind, I have compiled a TOP 15 based on my own opinion and bias, taking into account that even though they were easily defeated by Saitama, they may actually be strong!

One Punch Man Monster Strength Ranking TOP 15 "1st Place" "Boros"

Boros
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

Boros is the leader of the dark bandit group Dark Matter, and an alien who came from the edge of the universe to meet someone stronger than him. He came here 20 years ago after receiving a prophecy that there was someone on Earth who could fight on an equal footing.

If it were true, he'd be the final boss

Boros's transformation
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

He's a monster who seems to have come from the world of Dragon Ball, with the durability to withstand several attacks from Saitama that would normally end with one punch, his form changing when he receives an attack and his fighting ability increasing, powerful projectiles, incredible regeneration abilities, the ultimate form of his trump card, and a special move powerful enough to wipe out the surface of a star.

Saitama was too strong

Boros gets seriously punched
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

He is by any standards the strongest monster, and in other works he would be the last boss of a monster with such overwhelming strength, but Saitama, the protagonist of this work, has the power to evaporate the surface of a planet, and his special move is wiped out with a single serious punch, resulting in his easy defeat. However, Boros made Saitama call him strong and used Saitama's trump card, the "Serious Punch," so it can be said that he was the strongest monster that appeared in the game.

Who is the person in the prophecy?

Prophecy
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

Incidentally, Boros said that he received a prophecy 20 years ago, but Saitama was a 5-year-old child at the time, so the person the prophecy was about may not have been Saitama. The prophecy said that someone would appear who could fight on an equal footing, but in reality they were far from equal, so the opponent in the prophecy could be someone like "Blast," who was already active as a hero 18 years ago.

One Punch Man Monster Strength Ranking TOP 15 『2nd place』『Garou』

Garou
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

Garou, who learned Gakkairyusuiken from Bang, was dissatisfied with the fact that the heroes of justice in the world are not actually justice at all, but rather those who are powerful, powerful, or popular. To Garou, heroes are not champions of justice or bringers of equality, but rather symbols of inequality, and after sharpening his claws under Bang, Garou is finally ready to begin hunting heroes.

Growing Human Monster

Garou, outnumbered but still fighting
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

With his extraordinary fighting sense and learning ability, he fights heroes and monsters, repeatedly winning and losing, and each time he grows. Although he appears cruel and ruthless, he is only strict with the strong and heroes, and is rather kind to the weak, and strict with those who oppress the weak, so depending on how you look at it, he may even seem like the greatest hero.

Limiter removed

Garou without his limiter
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

In the original version, Garou's limiter is removed by repeated battles, and he gains a superhuman appearance and overwhelming power. Garou has gained enough strength to defeat the S-class heroes present, but his power is ineffective against Saitama, a man from another dimension, and he is defeated. After that, his inhuman appearance returned to normal, but his whereabouts are unknown.

One Punch Man Monster Strength Ranking Top 15 "3rd Place" "Black Sperm"

Black Sperm
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

A monster with an estimated disaster level of Dragon who belongs to the Monster Association. It is an infinite colony of 1,449,171,2554 sperm, and can split and transform its body. Each sperm has high combat ability, so it can unleash an overwhelming amount of violence. Because of this characteristic, it is the worst opponent for opponents who are not good at throwing firepower at everyone, such as Atomic Samurai. It is a powerful monster that has the potential to kill any strong opponent with a good match.

The Golden Sperm is born!

Birth of Golden Sperm
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

His trump card is when 10 trillion individuals combine to become golden sperm. In this form, he is unable to split or transform, so he will consume a large amount of his sperm stock. However, his fighting power is extremely high, and he is the ultimate form that combines overwhelming mobility, durability, and attack power. However, he was easily defeated by Garou, whose limiter was removed. He was one of the most powerful monsters in the series, but there seems to be a big difference in strength between him and Garou.

He managed to survive

Black Sperm
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

Even after the Monster Association arc ended, the sperm remnants survived, and Saitama seems to be stockpiling them to obtain protein for revival.

One Punch Man Monster Strength Ranking TOP 15 "4th place" "Vaccine Man"

Vaccine Man introduces himself
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

This memorable monster first appeared in One Punch Man when he attacked City A. Vaccine Man is a rather serious character born as a result of humans repeatedly polluting the environment, and born to eradicate the humans who continue to erode life on Earth. He fights Saitama, who has a lighter character who is a hero as a hobby, and is easily defeated with one punch. He's up against a bad guy.

Would City A have been destroyed without Saitama?

Vaccine Man
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

Vaccine Man was easily defeated, but he is a dangerous monster with the will to eradicate all of humanity, projectiles that can destroy cities on a large scale, and overwhelming fighting abilities that prevent 31 C-class to A-class heroes from even approaching him. If Saitama had not defeated him with one punch, the damage would have been devastating.

Bye Baikin

Goodbye Vaccine Man
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

He looks a bit like Baikinman, who is known for appearing in popular anime and aiming for the face, and One Punch Man began with a scene of One Punch Man vs. Baikinman (or his lookalike). His voice actor is Nakao Ryusei. Nakao's representative work is Baikinman, which means that the voice actor is the same.

One Punch Man Monster Strength Ranking Top 15 ``5th place'' ``Gouketsu''

Gouketsu
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

A monster belonging to the Monster Association who arrived at the Super Fight venue. He is a former Super Fight champion who was abducted by the Monster Association and consumed monster cells, giving him overwhelming strength as a fighter. He plans to give monster cells to the contestants in an attempt to increase their fighting power.

The strongest in the Monster Association

The bottomless Gouketsu
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

He overpowered Bakuzan, one of the contestants who had powered up by eating monster cells, and Suiryu, who is S-class in terms of hero strength, with his overwhelming strength, and at that point, the bottom of his power was still not visible. Even though it was a surprise attack, he was able to destroy Genos in one blow, showing his extremely high combat abilities.

Gouketsu who got mummy

Gouketsu who got mummy
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

However, Bakuzan was transformed into a pitiful figure by Saitama who rushed to his aid, and there was no detailed depiction of the battle when Saitama chased after Gouketsu, and he was transformed into a pitiful figure. The opponent was the one who was at fault.

One Punch Man Monster Strength Ranking TOP 15 "5th place" "Evil Natural Water"

Evil Natural Water
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

A monster of estimated disaster level dragon belonging to the Monster Association. As it is natural water, it does not have a specific shape and fights with a compressed water gun as a weapon. He can change his appearance, grow huge, and launch powerful attacks from long distances, and because he is made of water, physical attacks are ineffective.

Digested by the Pig God

Evil Natural Water Digested by the Pig God
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

He is so difficult to handle that even the genius Child Emperor has trouble dealing with him, and effective means of attack are limited. However, it does not seem to have a sense of self and only attacks in response to strong hostility from its opponent, so if it has no intention of attacking, it can be said to be basically harmless. He is a rare monster that did not die from Saitama's one punch, but was completely digested by Pig God who arrived on the scene later.

One Punch Man Monster Strength Ranking TOP 15 "6th place" "Overgrown Pochi"

Overgrown Pochi
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

An estimated disaster level dragon monster belonging to the Monster Association? Or rather a monster dog, or rather a pet dog. In addition to using powerful energy bullets, he is so sturdy that even attacks from Garou and Bang before awakening cannot cause him any serious damage.

Disciplined Pochi

Disciplined Pochi
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

However, perhaps due to the fate of a pet dog, after being taught to sit by Garou and Saitama, he is very obedient and will sit when told to "sit". After the Monster Association arc, he has shrunk to the level of a pet dog, but he is still alive and is Saitama's pet dog? It is.

One Punch Man Monster Strength Ranking TOP 15 ``7th place'' ``Homeless Emperor''

Homeless Emperor
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

A monster of estimated disaster level dragon belonging to the Monster Association. He used to be a homeless old man, but was given power by something calling itself God, and gained a power that can't be called a supernatural power, ``Divine Power.'' He can use powerful long-distance attacks, but he has no other means of attack and is cornered, eventually dying when something calling itself God steals his powers.

One Punch Man Monster Strength Ranking Top 15 "8th Place" "Melzargard"

Melzargard
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

The dark bandit group Dark Matter, who came from space with Boros, is also a fighter. The attack power of that blow was so strong that it wiped off the arm of Iaian, the second-placed A-class monster.

A monster that splits and regenerates

Goodbye Melzargard
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

Even if he is cut into pieces by Atomic Samurai's Atomic Slash, he regenerates with amazing regenerative abilities, and his body is home to five bodies, making him a monster like Goto, a parasitic beast that can split. Bang, Atomic Samurai, Metal Bat and Puri Puri Prisoner battle it together and struggle with its regenerative abilities, but Metal Bat overlooks the fact that its core is its weak point and they are defeated.

One Punch Man Monster Strength Ranking TOP 15 "9th place" "Glory Reverse"

Glory Reverse
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

Dark Matter, a dark bandit group that came from space with Boros, is also a fighter. It seems that their strength is about the same as Melzargard, who was defeated by four S-class monsters.

A punchline monster

Goodbye Glory Reverse
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

He has mouths on his face and both hands, and the acid breath he exhales from them will surely melt anything. He also seems to have many other special moves. However, he was defeated by Saitama two pages after his appearance, so his true strength is unknown. However, he is called a top-class fighter, just like Melzargard, so that's probably what he is. The opponent is a bad one.

One Punch Man Monster Strength Ranking TOP 15 "10th place" "Geryuganshp"

Geryuganshp
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

Dark Matter, the dark bandit group that came from space with Boros, is also a fighter. It seems that their strength is about the same as Melzargard, who was defeated by four S-class fighters.

A monster with psychic powers

Goodbye Geryuganshup
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

With an octopus-like appearance, he fights with psychic powers like Fubuki and Tatsumaki. His special move, Telekinesis Ryusekiha, is probably a powerful one, but he was easily defeated by Saitama's pebble throw, so we don't know his true power. But like Melzargard, he is considered a top-class fighter, so that's probably the case. The opponent is a bad one.

One Punch Man Monster Strength Ranking TOP 15 ``11th place'' ``Asura Kabuto''

Asura Kabuto
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

The strongest monster in history, created by Dr. Jinas' research facility ``House of Evolution''. He was imprisoned in an underground facility because he could no longer control his violent behavior, but was forced to release him when Saitama and Genos attacked.

Supermarket sale days were more important

Asura Kabuto is defeated by Saitama who remembered supermarket sale days
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

With his overwhelming fighting ability, Genos was transformed into a piece of modern art, and Genos' attacks were completely ineffective. He then goes into Ashura mode, his berserk form, and declares he will wreak havoc for a whole week, but Saitama, who remembered that today was a special sale day at the supermarket, defeats him with one punch. There's no doubt that he's a very powerful monster, as seen in the fighting ability that overwhelmed Genos, but he's up against the wrong people.

One Punch Man Monster Strength Ranking TOP 15 "12th place" "Giant Monster Centipede Elder"

Giant Monster Centipede Elder
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

A big-sized monster who was once seriously injured by Blast, the No. 1 S-class monster. Large monsters are naturally strong, and there were only a limited number of people who could deal with him because of his huge size. In fact, Metal Bat, Bang, Bomb, and Genos have all fought him but have been unable to defeat him.

A pesky guy who hides in holes

A staff member talking about the centipede elder's past
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

Not only is he big, he's also cunning, and when he's about to lose, he'll run underground, fighting like a boss from Zelda. Due to his durability and cunning, it was very difficult to defeat him without causing damage to the surroundings.

Defeated by King's fine play

Centipede Elder Attacks
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

However, King skillfully provoked him, luring him to a deserted area, and Saitama struck him with a single blow, resulting in a fine cooperative play that minimized the damage and succeeded in defeating him. It can be said that this monster had a fair share of highlights, which is rare in One Punch Man.

One Punch Man Monster Strength Ranking TOP 15 "13th place" "Skinny Bean Sprout"

Skinny Bean Sprout
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

It looks like a weak, ordinary bean sprout, and the disaster level is in line with its appearance. However, in reality, it is a monster with an extremely powerful power that can freeze the surrounding area.

Despite his appearance, he is cunning

A skinny bean sprout who fights while watching his opponent
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

Aside from his strength, what is astonishing is that he remembers the faces of all the S-class and A-class heroes, and he is a cunning monster who attacks when they let their guard down, or runs away if he doesn't think he can win. It goes without saying that the cowardly guy is strong.

Defeated in one punch by someone who is stronger than he looks

Bean sprouts defeated by someone who is stronger than he looks
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

However, it seems that they could not have predicted that there are people whose appearances do not match their strengths, such as some of the current S-class heroes who were originally C-class heroes. Maybe it was because of him doing something like that that he ended up on the receiving end of it and wasn't able to cope.

One Punch Man Monster Strength Ranking TOP 15 "14th place" "Marugori"

Attack on Marugori
Source: One Punch Man ©ONE, Murata Yusuke/Shueisha, Hero Association Headquarters

A chemist named Fukegao, who plans to conquer the world, develops a vicious steroid called "Biceps King" and administers it to his younger brother Marugori, turning him into a Titan from Attack on Titan. Of course the bigger the better.

Overwhelming size and destructive power

Marugori's Blow
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

Marugori has the overwhelming destructive power and mass to kill tens of thousands of people with a single fist, but after accidentally killing his brother like a joke, he was punched by Saitama and the aftermath of his collapse caused B City to disappear. This monster ended up with a single punch, but I think that a monster that kills tens of thousands of people in one punch is definitely at the level of a disaster of the Dragon. It's the person who is in the wrong.

Top 15th place in One Punch Man Monster Strength Ranking "15th place" "Mosquito Girl"

Mosquito Girl
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

She is a female-like monster created by Dr. Genus's research facility, "Home of Evolution." He has the ability to fly and can suck blood by manipulating mosquitoes, so he is an incredible monster that is extremely strong against human beings and spreads damage in a wide range and indiscriminately.

Mosquito girl who has become a star

Mosquito girl who became a star
Source: One Punch Man ©ONE・Murata Yusuke/Shueisha・Hero Association Headquarters

The true essence of this is that by collecting mosquitoes that have sucked blood, you can gain attack power and mobility that will overwhelm Genos. He was a monster with the potential to beat a higher-ranking opponent if the conditions were met, but Saitama slaps him to the point of view.

Reappearance inevitably

The Mosquito Girl was turned into a star with a single slap, but she is a rare monster who survived without dying even after being attacked by Saitama. Later, the House of Evolution was destroyed, and it was revealed on Murata's Twitter that he started a takoyaki restaurant with Dr. Genus and the Armored Gorilla, and is now a poster girl there.

Top 15 Monster Strength Rankings of One Punch Man Monster Strength Summary

This time, we have compiled a ranking of monster strengths based on our own opinion and prejudice, but there are many cases where the monsters that appear are so bad that they were actually stronger, so I would appreciate it if you could consider it as a single opinion. In any case, Mosquito Girls, ranked 15th, may make a comeback, so be sure to look forward to the reappearance of Mosquito Girls!

 

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