We all know the hero is the face of a video game franchise, but few realize that the sidekick companion is often the heart. You may be doing all the running and jumping, but there's no way you could keep it up without solid support. That's what these sidekicks offer: friendship, power-ups, unique abilities, cutesy sprite animations, healing items, exposition and a whole lot of heart. Without them, these games would lose their friendly flavors. Honestly, who would you rather hang out with, the dour military guy with no sense of humor or the smiley nerd who builds him machines? We list the best video game companions.