Page "Sidekick" Paragraph 11

It is also possible in certain cases for sidekicks to grow out of their role of being a second fiddle to the hero and become independent heroes in their own right.

Dick Grayson is one such example, having outgrown the mantle of Robin when he was under Batman and taken up the new identity of Nightwing.

Grayson later temporarily succeeded his mentor and took on the costumed identity of Batman himself.

Another example is the popular comic-strip soldier of fortune Captain Easy, who started as the two-fisted sidekick of the scrawny eponymous hero of the strip Wash Tubbs.