When it comes to anime that can make almost anyone laugh, One-Punch Man easily takes a top spot. With its quirky character designs and unforgettable moments like Saitama revealing the reason behind his baldness, this anime has left a lasting impression with its unique brand of humor.
And with humor often comes an endless supply of memes flooding the internet. One-Punch Man is no exception, as it boasts plenty of iconic scenes that have been turned into meme-worthy moments. Below are ten hilarious One-Punch Man memes that continue to entertain fans everywhere.
Saitama proves that written tests are the real challenge (Photo: One Punch Man/Madhouse)10. Scraping Through With Barely Enough Marks
The most relatable memes are often those that mirror real-life experiences. Everyone has had that moment in school when they felt confident about an exam, only to be shocked by a disappointing result. Even someone as powerful as Saitama isn’t spared from this reality.
This particular meme is drawn from Saitama’s Hero Certification Exam results, where he barely cut. Given that he can annihilate opponents with a single punch, one would assume he would rank high in the hero classification system, just like his apprentice Genos, who instantly became an elite S-Class hero.
However, Saitama’s real struggle was with the written portion of the test, which turned out to be tougher than he expected. He ended up with a barely passable score, just enough to secure him a spot in the Hero Association. At least he made it through!
9. Saitama’s Hardcore Training Routine
Saitama’s transformation from an ordinary man to an unbeatable hero came from an intense workout regimen that involved doing 100 push-ups, 100 sit-ups, 100 squats, and running 10 kilometers daily.
With sheer determination, consistency, and an iron will, he not only built an impressive physique but also gained an extraordinary level of strength. Turning what seems impossible into reality, Saitama’s fitness journey—though fictional—has inspired real people to adopt his workout.
What started as a joke became the famous “One-Punch Man Workout Challenge,” where fitness enthusiasts try to follow Saitama’s strict routine in hopes of achieving visible results.
8. Saitama’s Two Opposite Faces
A major reason why Saitama is such an entertaining character is the stark contrast between his two facial expressions. When it’s time to get serious and fight, his features sharpen, making him appear as fierce as the power he possesses.
However, outside of battles, he carries a relaxed and almost goofy demeanor, with his simple, egg-shaped head making him look far from threatening.
The drastic switch between these expressions sometimes feels like an exaggerated Snapchat filter, enhancing his features dramatically in one moment and making him look clueless in another.
7. Caillou’s Grown-Up Version
When you think about Saitama’s looks, two things immediately come to mind—his bald head and his signature yellow-and-red outfit. Coincidentally, there’s another character with the same physical features: Caillou, the main character from the beloved children’s show.
The striking resemblance between the two has made way for a meme that suggests Caillou could be Saitama’s younger version.
For those who grew up watching Caillou and later got into One-Punch Man, this joke becomes even funnier—it’s almost as if Caillou grew up alongside them and became the world’s strongest hero.
6. Anpanman vs. One-Punch Man
Unlike Caillou’s resemblance to Saitama, which seems like a coincidence, Anpanman’s similarities are completely intentional. One-Punch Man was inspired by Anpanman, a classic Japanese superhero with a head made of a red bean bun. Similarly, Saitama’s perfectly oval head is often compared to an egg.
There are also strong resemblances in their superhero outfits. While Anpanman wears a mostly red suit with yellow gloves and boots, Saitama rocks a yellow suit with red gloves and boots. It wouldn’t be surprising if Saitama took some fashion inspiration from this legendary hero.
5. The Banana Mishap
During a moment that should have been serious, Saitama pays a visit to the hospital to check on heroes who were injured after battling Garou. But instead of bringing something thoughtful like flowers, he casually arrives with a bunch of bananas—though not as gifts for the injured heroes, but as snacks for himself.
Saitama’s lack of emotional depth sometimes leads him to take serious matters lightly, and this was one of those instances.
He attempts to comfort the hospitalized heroes in the most half-hearted way possible—placing a banana on Mumen Rider’s stomach, handing one to Tank-Top Master, and balancing another on Charanko’s broken leg. To Saitama, everything, no matter how bad, can be solved with bananas.
4. Tatsumaki’s Original Art Tribute
Long-time One-Punch Man fans are aware that the manga’s original artwork looks completely different from what is seen in the anime. This is because the original was drawn by ONE, while the redrawn and highly detailed version used in the anime was illustrated by Yusuke Murata.
In a clever nod to its origins, the anime features an Easter egg where Fubuki appears in her usual detailed design, while Tatsumaki is drawn in a much simpler style that closely resembles her original manga form. The contrast between these two versions in the same frame makes the scene a natural meme.
3. The “Sassy Lost Child” Insult
Tatsumaki, despite being one of the strongest S-Class heroes, often finds herself mistaken for a little child due to her petite frame. This led to a memorable scene where Saitama, after being insulted by her, dismissively refers to her as a “sassy lost child.”
Barely passing, but still making history (Photo: One Punch Man/Madhouse)The joke quickly spread, with people using the phrase to label other small but feisty characters from different anime and games. One of the most popular edits replaced Tatsumaki with Alolan Meowth from Pokémon, making the meme even funnier.
2. Saitama’s True Arch-Nemesis
Saitama has taken down countless fearsome villains, usually with little to no effort. But there’s one enemy that seems completely immune to his strength—a tiny mosquito. Despite swatting at it with incredible speed and force, the bug evades every attempt and remains unharmed.
For someone who can defeat monsters with a single punch, struggling against something as insignificant as a mosquito adds an unexpected layer of comedy to his character.
1. The Legendary “OK” Meme
Perhaps the most famous One-Punch Man meme is the one where Saitama responds with a simple, emotionless “OK.” The scene takes place during his battle against Lord Boros, who attempts to intimidate him by boasting about his increased power after removing his armor.
Unimpressed, Saitama simply replies with a casual “OK.” This reaction has since been used in countless situations where someone expresses excitement or urgency, only to be met with an underwhelming response.
It has remained a timeless joke, proving that sometimes, the best way to react to exaggerated claims is with pure indifference.