When it comes to the Kamehameha, Goku undoubtedly has the strongest version in the “Dragon Ball” series.
Master Roshi, the creator of the Kamehameha wave, taught this powerful energy blast to his students, including Goku. While Roshi’s Kamehameha is incredibly potent and was groundbreaking when first introduced, Goku has taken this technique to unprecedented levels.
Over the years, Goku has trained extensively and fought countless battles, continually pushing the limits of his abilities. His versions of the Kamehameha, such as the Super Kamehameha and the Ultra Instinct Kamehameha, exhibit immense power and have been crucial in his victories against formidable enemies.
Thus, undoubtedly Goku has the strongest Kamehameha in the whole Dragonball universe.