Goku has frequently granted mercy to his enemies, which has often earned him additional allies.
 Toriyama did not initially plan to make Goku an alien, it was not until the introduction of fighters from other planets that he established him as a Saiyan
In his book about Akira Toriyama published in 2004, Julius Weideman said Goku's journey and ever-growing strength resulted in the character winning "the admiration of young boys everywhere

