No, Krillin never becomes a Super Saiyan because he's a human, but in Dragon Ball Super, he becomes strong enough to fight on par with base form Saiyans and keep up with even Super Saiyan Blue Goku through intense training, making him arguably the strongest Earthling, but still far weaker than an actual Super Saiyan form. His power level can be debated, but he reaches impressive feats, like staggering Cell Max, showing he punches far above typical human limits but not at the Super Saiyan tier.
Krillin's the strongest human on Earth, and he can sense power levels using his ki sense. So, before Granolah and Gas got their power boosts from the Dragon, Krillin was stronger than both of them—probably even stronger than them combined.
Krillin can fight Goku in super and push him into going super saiyan, that alone makes him far more powerful than DBZ Frieza.
Krillin could beat anyone from OG Dragonball, Nappa, Saiyan Arc Vegeta, and the whole Ginyu force except Captain Ginyu at minimum. We know his power during Namek capped at 75,000 which puts him above Jeice Recoome Burter and Guldo, but below Captain Ginyu.
Krillin never becomes a Super Saiyan in the series. This transformation is exclusive to Saiyans, and Krillin is a human. Despite his rigorous training and notable strength, he cannot achieve this form. He remains one of the strongest humans but is surpassed by Saiyan characters.
In the manga roshi is stated to be superior.
In response to Nappa's query about Goku's power level, Vegeta yells: "It's over nine thousand!", crushing his scouter in his fist. In the original Japanese version of the scene, and most versions subbed in languages other than English, Vegeta actually says "It's over 8000!".
The Ultimate Tenkaichi Hero manages to defeat Omega Shenron and collects all seven but is confronted by Ultimate Shenron who attacks them when he is summoned due to Omega Shenron's negative energy. The hero manages to defeat Ultimate Shenron, removing the negative energy from him restoring the Dragon to normal.
The way zenkais boosts helped Vegeta raise his power level and defeat multiple opponents on Namek was crazy. Goku, from one zenkai boost, went from a power level of 90,000 to 3,000,000.
In Dragon Ball Z: Lord Slug, after Piccolo transfers his energy to Goku, Goku uses the Kaio-ken x100 to rip a hole through the giant Lord Slug.
In the end, Krillin is much more versatile and well-rounded than Tien is. He quite possibly may be more powerful than Tien. But Tien is the better fighter and will always bring down the house in fights (even if it kills him) because: He's much better under pressure.
Goku's power level is famously both 8,000 (in the original Japanese) and 9,000 (in the iconic English dub) during the Vegeta Saga, a difference caused by a translation choice that created the legendary meme, though in the story, Vegeta declares it's "over 8,000" or "over 9,000" when Goku powers up for his fight. While Goku's base level was around 8,000 (or 5,000 suppressed), his true power was much higher with techniques like Kaio-ken, exceeding these early readings significantly.
It's not strength of body that allows someone to lift the hammer. It's stregth of heart and character. Thomas Lettington since when ? Goku would easily be deemed worthy to wield it, although he would have very little to gain from it.
The rarest Saiyan, according to Vegeta, is his son Trunks, not Broly, because Trunks was born with blue hair, breaking the traditional Saiyan biological rule of black hair, making him a unique anomaly in Saiyan history. While Broly's "Legendary Super Saiyan" is incredibly rare and powerful (occurring every thousand years), Trunks' natural birth trait sets him apart as the truly rarest individual.
Be prepared for spoilers down the line as well as seeing your childhood hero in a not so positive light.
Goku's fear of needles is a character trait that adds depth and humor to his personality.
Krillin is stronger than Yamcha. No doubt about it. However, Yamcha is not that far behind Krillin in terms of strength and fighting. When they were both having a sparring match in Otherworld, Yamcha was dead even with Krillin, despite both having not trained in 7 years.
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Saitama (One-Punch Man)
This gives Saitama an edge, as his strategy is to end fights swiftly. A single punch to Goku's head or body could be enough for him to secure a quick victory, preventing Goku from transforming into his more powerful forms, which might present a tougher challenge.
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