http://en.wikipedia.org/wiki/List_of_comic_book_sidekicks
http://en.wikipedia.org/wiki/Kid_Flash
http://en.wikipedia.org/wiki/Young_Justice_%28TV_series%29
I know Wikipedia isn't a good source, but I used it, whatever.
There will be more as the story goes, I PROMISE YOU. So watch for more links, and go read the god dang story.