Kung Fu Kid

The Kung Fu Kid is a a child or teenager with a very high level of skill in martial arts, whose skills are particularly noteworthy in the context of the story. Sometimes the skills are first acquired during the course of the story, and sometimes the character begins the story already having a significant level of martial arts talent. If it is a Sports Story, the Kung Fu Kid will likely be working toward a major tournament. In a Fighting Series the Kung Fu Kid will regularly battle against enemies, often in tournaments but sometimes in deadly serious combat. In Spy Fiction, the Teen Superspy is often a Kung Fu Kid. In Fantasy or Superhero stories, a character's martial arts skills might be sufficient to qualify them as a Badass Normal that can stand toe to toe against more supernatural enemies. Some characters may have martial arts skills that could be classified as Supernatural Martial Arts, or even as a Charles Atlas Superpower. Sometimes the kid combines spell casting with martial arts to be a Kung Fu Wizard.

No Real Life examples unless this kid is considered particularly exceptional and famous in the martial arts world. This should not turn into a listing of everyone with a black belt. Nor should it list every young character that takes a karate class but only has the fact mentioned in one or two episodes and gets into perhaps one fight against an untrained person using a minor example of martial arts skills. Mark Taylor of Home Improvement would not qualify, for example.

This is the martial arts equivalent to the Child Mage or the Kid Detective. Compare to Kid Samurai, Ninja Brat, Cute Bruiser and Waif Fu. The Kung Fu Kid might also be a Kid Sidekick or a Kid Hero. If female, she may be a Little Miss Badass.

Not to be confused with The Karate Kid, though the movie series does provide several perfect examples.

Examples of Kung Fu Kid include:

Anime and Manga

Dragon Ball - Goku, Krillin and Chichi
Dragonball Z - Gohan in the first few seasons
Fullmetal Alchemist - May Chang
Kenichi: The Mightiest Disciple - A number of characters, most notably the titular Kenichi Shirahama.
Magical Girl Lyrical Nanoha ViVid - As this is essentially a Fighting Series with Magical Girls, several characters fall under this, including the main character Vivio and her main rival Einhart.
Mahou Sensei Negima - Many of the major characters would qualify, particularly Ku Fei. Negi Springfield combines Child Mage with Kung Fu Kid to become a Child Kung Fu Wizard.
Ouran High School Host Club - Mitsukuni "Hani (Honey)" Haninozuka
Ranma ½ - Almost the entire teenage cast, except the older two Tendo sisters
Tekken Chinmi - The titular young boy Chinmi trains to be a world class kung fu master.
Tiger and Bunny - Pao-Lin Huang aka Dragon Kid uses kung fu against criminals at least as much as she uses her lightning powers.

Comic Books

Batgirl - The Cassandra Cain Batgirl is a teenager trained to be an assassin, but whose empathy for human beings prevents her from ever actually going lethal.
Legion of Super-Heroes - Karate Kid (Val Armorr) is a master of every form of martial arts to have been developed by the 31st century
Teen Titans - Robin is a Badass Normal whose skill in martial arts allows him to keep up with his superpowered teammates.

Film

Super Kung Fu Kid - Man Lung
The Karate Kid - Daniel Larusso, Andre Parker
Three Ninjas - Samuel Douglas Jr., Michael Douglas, Jeffrey Douglas, Miyo
Sidekicks - Barry Gabrewski

Literature

Alex Rider - Alex has a black belt in karate, which alone is not enough to qualify for this trope, however he regularly uses his martial arts skills during his spy missions.
The Black Belt Club - A children's book series about four young martial artists who go on secret missions.
CHERUB - All CHERUB agents train in advanced martial arts, however Bruce Norris is particularly noted for his martial arts talent.

Live Action TV

Kung Fu- Young Caine in the Once an Episode Flashbacks
Kung Fu Kids - A Philippine TV series tells the story of seven kids of different personalities united by a prophecy. The Kung Fu Kids train under the village idiot who turns out to be a Kung Fu master from China.

Tabletop Games

Feng Shui - Scrappy Kids are based on this character type in Hong Kong cinema.
You can also play a Kung Fu Kid in Hong Kong Action Theatre, though you will need "To Live and Die in HK" to do so.

Video Games

Kung Fu Kid - A 1987 Sega Master System video game about a kid that uses his knowledge of kung fu to fight enemies.

Web Comics

How I Killed Your Master - The stories with the younger versons of the main character are something of a deconstruction, since he still has to spend a great deal running away or being rescued. Then again some of the rescuers count as this trope as well.

Western Animation

The Life and Times of Juniper Lee
Shuriken School - Eizan Kaburagi, Jimmy B. and Okuni Dohan
Xiaolin Showdown - Though the protagonist ages are never give they don't seem to be older than 14
Avatar: The Last Airbender - the young heroes (and villains), though proficiency in kung fu is pretty common in that world regardless of age.
- A straighter example of this trope is present in the Sequel Series The Legend of Korra. Korra, the new Avatar, first started earthbending when she was five years old, something completely unheard of in the history of the Avatar. Even Aang, the youngest Avatar to ever master all four elements, didn't start learning his second element until he was twelve; and most Avatars don't even find out their identity until they turn sixteen.