[[quoteright:250:[[Franchise/{{Batman}} http://static.tvtropes.org/pmwiki/pub/images/250px-Detective_Comics_38_8679.jpg]]]]
[[caption-width-right:250:And the rest is history...]]

->''"Behind every hero, there is always a wisecracking, obnoxious '''Nincompoop!'''"''
-->-- '''Samos''' on ''[[Franchise/JakAndDaxter Daxter]]''

The friends and helpers of the main hero. They can be almost any type of {{hero|es}} playing a secondary role, a normal character observing the action, or PluckyComicRelief - sometimes all three. Typically they are a {{Foil}} to the hero, and this is often underscored by their dramatically different appearance.

Sidekicks [[RecklessSidekick often get themselves into trouble]], so the hero can rescue them. They also give the hero or MrExposition someone to [[TheWatson explain the plot to]]. In the finale, they may line up against the EvilMinions. (The reason why they are called sidekicks and not the Good Minions is part tradition and inertia, and part the differences between the two relationships -- because the hero and sidekick both are heroic, reciprocal bonds of loyalty and friendship are far more likely than between the villain and his minions.)

Sidekicks are [[OlderSidekick almost never older]] than the main hero.

In {{Comic Book}}s, SidekickGraduationsStick: the "graduation" of a former sidekick into an independent hero in his own right is one of the few categories of changes that tend to avoid being reversed in the long run. However, before that graduation you'll see them get stuck with a lot of dead ends, like HeroHarassesHelpers and the SidekickGlassCeiling, though he rarely gets hit with NeverBeAHero. But if the hero bites the dust or otherwise ends up out of action, they're the number one candidate for a LegacyCharacter. ([[DeathIsCheap if it sticks]])

Particularly common sidekick types include:
* KidSidekick
* DamselInDistress
** DamselScrappy
* CowardlySidekick
* BumblingSidekick
* HypercompetentSidekick
* ChessmasterSidekick
* NonHumanSidekick
** GratuitousAnimalSidekick
** SnarkyNonHumanSidekick
* FairyCompanion
* PsychoSidekick
* OlderSidekick
* RecklessSidekick
* TalkingApplianceSidekick
* TheWatson
* BastardUnderstudy is an evil variant.
* NonPlayerCompanion is a gameplay implementation of this trope.