-> ''At this moment there was a loud ring at the bell, and I could hear Mrs. Hudson, our landlady, raising her voice in a wail of expostulation and dismay.''
->''"By heavens, Holmes," I said, half rising, "I believe that they are really after us."''
->''"No, it's not quite so bad as that. It is the unofficial force - the Baker Street irregulars."''
->''As he spoke, there came a swift pattering of naked feet upon the stairs, a clatter of high voices, and in rushed [[StreetUrchin a dozen dirty and ragged little street Arabs]]. There was some show of discipline among them, despite their tumultuous entry, for they instantly drew up in line and stood facing us with expectant faces. One of their number, taller and older than the others, stood forward with an air of lounging superiority which was very funny in such a disreputable little scarecrow.''
-->-- '''Literature/SherlockHolmes''' in ''The Sign of the Four'' (Doubleday p. 126)

Sometimes, a detective or police officer, no matter how great, simply needs help from time to time. It's no big deal, really. The Baker Street Regular is [[KidSidekick that child]] that finds himself in the situations with the hero, especially the dangerous ones.

Your first run in with the Baker Street Regular is likely while he is [[SnoopingLittleKid searching through the hero's home or office]] or [[StreetUrchin stealing something to eat because he cannot afford it]]. If he is not related to the hero in any way, expect him to have no family, except for maybe a sibling or two, but he is almost always the eldest, and almost always male. If he is an orphan, [[BecauseYouWereNiceToMe after scratching his back a couple times, expect him to be forever indebted to you]] and to get you out of a sticky situation in the nick of time, but don't expect him to just leave. You're stuck with him.

After you manage to win the respect of the Baker Street Regular, he will be an invaluable tool and assistant to your group. Life on the street is going to make him able to hear rumors that you won't be able to while you are out on your investigations. He is always good at hiding, especially in situations where the BigBad is nearby.

The Baker Street Regular is a pun on the TropeNamer, the Baker Street Irregulars, who were a network of orphaned street urchins that had been under the employment of Sherlock Holmes to gather rumors, gather clues, and do various odd jobs, in which he made sure to pay what was, [[MundaneLuxury to them, an outrageous sum of money]] for their discretion and loyalty.

See also TheInformant, who is usually somewhat older and portrayed rather less sympathetically.

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!!Examples:

[[AC:{{Anime}} and {{Manga}}]]
* Subverted in ''Manga/BlackButler''. Doll, aside from not being the eldest (though that is justified due to her elder "siblings" being GenreBlind), gives Ciel help, covers for him, and fits this trope to a T [[spoiler: before Ciel goes into an episode and orders for her death.]]
* In ''Manga/DetectiveConan'', Ayumi, Genta, and Mitsuhiko, the Detective Boys. They're even referred to as Baker Street Regulars in an arc. They ''literally'' play this when they entered the {{cyberspace}} VictorianEngland AU in the NonSerialMovie ''Phantom of Baker Street''.
* As the plot approaches the end of ''[[{{Slayers}} Slayers Next]]'', one of these attempts to pickpocket the party, but eventually joins them and befriends Martina. Subverted, as [[spoiler: he's the BigBad.]]

[[AC:{{Comics}}]]
* In the Post-Crisis retelling of his origin, this is how Jason Todd first met Franchise/{{Batman}}. He was trying to steal the Batmobile's hubcaps at the time.
* TheNewsboyLegion are nothing if not this trope. Primarilly they are this for TheGuardian, but they also work with JimmyOlsen and Comicbook/{{Superman}}.

[[AC:{{Film}}]]
* Charlie Chaplin in ''Film/ShanghaiKnights''.
* Short Round in ''Film/IndianaJonesAndTheTempleOfDoom''.
* The street urchin Toto in ''[[Film/AmericanNinja American Ninja 2]]'', who never forgets to demand money for service rendered.
* The kid Manco pays to keep tabs on Mortimer in ''Film/ForAFewDollarsMore'' fits the bill.
* Averted with the Blue Blaze Irregulars in ''Film/TheAdventuresOfBuckarooBanzaiAcrossThe8thDimension''. They're not all kids, they're not all urchins or orphans, and there is (according to the book, anyway) a training program, required progress in education, and other requirements.

[[AC:{{Literature}}]]
* The Baker Street Irregulars from ''Literature/SherlockHolmes'', who inspired the trope name.
** Deconstructed in the officially-approved pastiche, ''TheHouseOfSilk'', when [[spoiler: one of them gets killed, brutally, because they took a mission]].
* Akechi Kogoro had several as well, including Yoshio Kobayashi, [[{{Shotacon}} who later became famous for something else entirely]].
* ''Literature/SolarPons'' has the Praed Street Irregulars.
* Nobby Nobbs is introduced in ''Discworld/NightWatch'' as one of these. Vimes sees Nobby spying on him for a whole slew of people, and begins paying Nobby to, in turn, spy on them. Sometimes members of the Beggar's Guild, although largely adults and therefore on the very fringes of the trope, act as this for Lord Vetinari as one of many information-gathering channels (it's implied that someone who may in some small way be connected to him spreads rumors that he pays for information, so that they'll come volunteer it to him instead of him needing to send someone looking). It's implied Vimes occasionally gets information from them as well.
* Ostap Bender from Ilya Ilf and Eugene Petrov's ''Literature/TheTwelveChairs'' employed them to track one of the titular, possibly treasure-holding chairs.
* Ben Fischer had apparently started as this in his {{backstory}} in ''Literature/HellHouse'', before his powers awakened.
* In the third book of the ''Literature/BardicVoices'' series, ''The Eagle and the Nightingale'', Nightingale hires a group of street children to be her eyes and ears.
* In ''Literature/HonorHarrington'' while on a secret mission to Mesa Victor Cachat employees a number of street urchins to serve as a spies and couriers.

[[AC:LiveActionTV]]
* ''Series/ThePretender'' episode "Back from the Dead... Again" has [[TheArtfulDodger Bruno]] who gets recruited by Jarod to help him for the episode.
* Fittingly for a reimagining of Sherlock Holmes himself, ''Series/{{Sherlock}}'' has Bill Wiggins, a heroin addict who doubles as a chemistry genius.
** The TropeNamer also does not go un-riffed; the pilot episode introduces Sherlock's "homeless network," who are an obvious stand-in for the Irregulars.

[[AC:NewspaperComics]]
* Dick Tracy, Jr, from ''ComicStrip/DickTracy'', is one of the examples of a street urchin who gets adopted. Also appears in the film.
* ''ComicStrip/ModestyBlaise'': Samantha 'Sam' Brown is an East End kid who attends a martial arts class run by Willie. She and her gang of street urchins sometimes fill this role for Willie and Modesty.

[[AC:{{Theatre}}]]
* Billy, the page boy to William Gillette's ''Theatre/SherlockHolmes'', who was adapted from a similar character in the original Holmes novels.

[[AC:VideoGames]]
* Lilly in ''VideoGame/{{Ceville}}''.
* Luke and, to a lesser extent, Flora in the ''ProfessorLayton'' games are variations on this trope. Flora mostly fits in the sense of being [[spoiler:an orphan who gets adopted by the protagonist]], though she ''tries'' to be useful in the Professor's investigations. Luke plays the trope almost straight; however, his parents are still alive and perfectly comfortable financially, and he must [[spoiler:surrender the post at the end of the third game, when the family moves overseas]]. In fact, it's thanks to his parents that Luke is hanging around in the first place -- Clark Triton is an old friend of the Professor's, which probably explains why they're willing to let a grown man take their preteen son gallivanting off to solve mysteries impeded by hordes of people who insist you use thirteen coins to spell "waffle".
* Brynn from ''VideoGame/DreamfallTheLongestJourney'' acts this way towards April.
* In ''Franchise/MassEffect'', Thane would sometimes employ street urchins to gather intelligence for him.

[[AC:WesternAnimation]]
* Kit Cloudkicker in ''WesternAnimation/TaleSpin''. Molly can also apply in most episodes she's in.
* ''WesternAnimation/SherlockHolmesInTheTwentySecondCentury'' has the new Baker Street Irregulars: soccer player Wiggins, the Eliza Doolittleish Deidre, and the paraplegic Tennyson (who communicates through electronic beeps only Holmes seems to comprehend ironically).

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