Sidekicks are as old as literature itself. Throughout history, famous fictional characters often partnered up with assistants who would support the former’s exploits and offer a counterpoint to their perspectives. From Don Quixote's squire Sancho Panza to Sherlock Holmes' friend Dr. John Watson, their chemistry not only gives the hero a foil but also gives readers a relatable focal point in the narrative. In the early days of superhero comics, the companies that eventually became DC and Marvel Comics created kid sidekicks for their popular characters. Their aim was connecting with an untapped younger demographic, teaching them valuable life lessons while giving them relatable role models.
Source：https://www.cbr.com/spiderman-spiderboy-batman-sidekick-marvel-comics/
