Krillin doesn't have a Super Saiyan mode because he's only human. He has managed to learn one of the most powerful attacks in the series: the Destructo Disc. This sawblade forged of ki has the potential to slice any foe. Victims of the blade include Maijin Buu, Nappa's face, and Frieza's tail.
Krillin is 100% human, despite having no nose. In order to turn Super Saiyan, one needs to have at least some degree of Saiyan ancestry. Krillin does not have that.
Once there, they save a young Namekian called Dende from death at the hands of Frieza's henchmen. Krillin receives an increase in power from Guru, the grand elder of the Namekians, when he unlocks his hidden potential.
Krillin is an adult human male. The "adult" part of that can seem pretty unbelievable at times given he is the approximate height of a saibaman. There is no canonical explanation for him to be so short. He is not a little person, nor does have any magical or medical reasons to be this tiny.
Dragon Ball's Strongest Human is Yamcha, Not Krillin, & Super Proves It - IMDb. Yamcha - and not Krillin - deserves the title of Dragon Ball's strongest human. Due in large part to his death at the hands of a Saibamen, Yamcha is often ridiculed as one of the weakest heroes in the franchise.
Krillin : ... Yes, I do! I would like you to change Android 17 and 18 into human beings, so they can live out their lives in peace!
Krillin doesn't have a Super Saiyan mode because he's only human. He has managed to learn one of the most powerful attacks in the series: the Destructo Disc.
Krillin is often considered the weakest member of the Z-Fighters in Dragon Ball Z. However, he could easily defeat Perfect Cell and Frieza in a fight. Krillin has always had a hard time in Dragon Ball Z. He was outclassed from a young age by Goku and never managed to make up the difference in terms of combat ability.
Krillin originally started out with traditional white irises, but once he reached adulthood the white was drawn away completely. Ironically this made him look closer to Charlie Brown, whose eyes are drawn in a similar style.
According to the manga-focused magazine V-Jump, Krillin's power level reached 75,000 after his fight with Recoome.
In the anime, Krillin proves capable of holding his own against base form Goku, but it quickly becomes apparent that he would lose in a no holds barred match with Super Saiyan Goku.
1 Can't: Krillin
Although Krillin is strong, he doesn't have what it takes to tap into the power of Ultra Instinct. Being a skill that even the likes of Goku and Beerus have struggled to master, it goes without saying that attaining this power is nigh impossible for Krillin.
Dragon Ball Z
He also reveals to Goku that he is a Saiyan warrior and was sent to Earth when he was a baby in order to wipe out all life. Master Roshi informs the confused and shocked Goku of a story that Grandpa Gohan told him.
Dende is canonically one of the weakest characters in the series through sheer virtue of not being a fighter by any means. He makes up for this, however, by being a member of the Namekian Dragon Clan. Instead of fighting, he heals. It's his healing that keeps the Z-fighters alive during their fight with Frieza.
However, even with all of his talent, Dende is probably the weakest of the gods in Dragon Ball. Sure, he's the protector of Earth—appointed by Goku, no less—but, if one of the other deities wanted to annihilate the entire planet, there really isn't much Dende could do about it.
Despite knowing martial arts, Hercule Satan is probably Dragon Ball's weakest Earthling, which also makes him the weakest fighter. Over the course of the show, he was seen mainly showboating and taking credit for fights won by the Z Fighters.
Krillin was typically bullied by other students at the temple though, as he was much shorter than the other kids, and they felt he would never make for a good fighter. Krillin ultimately left the temple but continued to shave his head, symbolizing that he still believed in the teachings of Buddha.
Krillin isn't naturally bald! Krillin's hairlessness may be one of his trademarks, but he's not actually bald. As a dedicated student of the martial arts, Krillin keeps his round head clean-shaven in order to "unfetter his Ki".
No, Yamcha is not a Saiyan. #1. He always felt as if an important character was neglected. Like Krillin and Tenshinhan, and unlike Gohan, Goten, and Trunks, he's actually a serious warrior.
18 fell for Krillin because she admired his bravery as well as him being a loving husband and a good father but in Super, she keeps complaining about how he's not manly enough which then leads to him having to save her all the time.
18 and her brother, Android 17 seemed hell bent on destroying everything in their path, but when 18 came across Krillin, she and the other Androids spared him. 18 then gave Krillin a kiss on the cheek for luck before walking away.