Main cast

• Jairus Aquino as Waldo "Lembot" Ramos (Kid Weakling)/Fish Boy/Fei - has the ability to perceive slow motion and has the fighting style of an eagle. His main weapon are a pair of tonfa. His catchphrase is: "One... Two... Lipad (Fly)!".
• Andre Garcia as Chester "Chubbs" Trinidad (Kid Chubby) - has the ability to make any force applied to his tummy bounce back and has the fighting style of a turtle. He is the only Kung Fu Kid without a weapon. His catchphrase is: "Super Chao Bite and Supreme Siopao Attack!".
• Eliza Pineda^[2] as Saranelle "Sarah" Magalang (Kid Simple) - has the ability to hear distant noises despite her poor eyesight and has the fighting style of a stingray. Her main weapon is a parasol. Her catchphrase is: "Pulsar Payong (Umbrella)!".
• Paul Salas as Leonardo "Uragon" De Vela (Kid Leader) - has the ability of super strength and has the fighting style of a bull. His main weapon is a pair of arnis. His catchphrase is: "Seismic Sipa (Kick)!".
• Jane Oineza as Moiranielle "Moira" Ocampo (Kid Maarte) - has the ability to control frogs through the power of "pambabarang" that she adopted from Crispin and has the fighting style of a frog. Her main weapon is a lasso. Her catchphrase is: "Lashing Laso (Ribbon)!". She is later revealed to be Benjo's half-sister.
• Kristoffer Martin as Benjamin "Benjo" Reyes (Kid Bully) - has no ability gifted with the sixth sense and has the fighting style of a scorpion. His main weapon is a pair of nunchaku. His catchphrase is: "Shadow Sipit (Claw)!". He is later revealed to be Moira's half-brother.
• Joshua Dionisio as Jaizer "Jazz" Marasigan (Kid Judas) - has the ability to control/ manipulate energy blasts through his hands and has the fighting style of a whale. His main weapon is a bō staff. His catchphrase is: "Tsunami Sapak (Punch)!".
• Darien O'Dell as Maneki/The 8th Kung Fu Kid - has the fighting style of a dragon. His catchphrase is: "Crouching Kalmot (Scratch)!". Darien O'Dell acted as Maneki's human form.

Supporting cast

• Sid Lucero as Master Kung Lee (Kung-Krung) - Uses the power of a horse, cheetah and jaguar and he is also the one responsible for calling the Kung Fu Kids.
• Gerard Pizarras as Macoy Ramos/Ferdinand Fernandez (Fisherman) - the main villainous uncle of Lem, father of Baby and stepfather of Gian (Father is Master Kung Lee)
• Matteo Guidicelli as Gian Marasigan Fernandez - Cousin of Lem and Baby and son of Kung Lee
• Erich Gonzales as Nicole "Nick" Magalang - sister of Sarah
• Wowie de Guzman as Waldo Ramos Sr. - father of Lem and stepfather of Baby
• Cheska Billiones as Baby Ramos - half-sister of Lem, daughter of Macoy A.K.A. Fisherman and stepdaughter of Waldo
• Allen Dizon as Congressman Adrian Ocampo^[3] - father of Moira and Abby. He is also the father of Benjo.
• Christopher Roxas as Thomas Trinidad - Father of Chubbs
• Kian Kazemi as Teban^[4] (deceased)
• Arlene Muhlach as Mrs. Lydia Trinidad - mother of Chubbs
• Yayo Aguila (Pinoy Big Brother: Celebrity Edition 2) as Mrs. Ocampo - Mother of Moira and Abby
• Izza Ignacio as Mrs. Magalang - Mother of Nikki and Sarah
• Hero Bautista as Mr. Selon Magalang - Father of Nikki and Sarah
• Mickey Ferriols as Melisa "Lisa" De Vela - mother of Uragon
• Bong Revilla as Diether Martin "Diether" De Vela - father of Uragon
• Mariel Rodriguez as Elena Marasigan Fernandez - girlfriend/wife of Macoy and Kung Lee and mother of Gian
• Asia Agcaoili as Sheila - former ally of the Fisherman (deceased)
• Jhong Hilario as Kevin Marilao - former ally of the Fisherman
• Ina Feleo as Sister Mona
• Isabel Blaesi - Karen Alvarez - ex-girlfriend of Gian (deceased)
• Noemi Oineza as Abigail "Abby" Ocampo - sister of Moira and half-sister of Benjo.
• Thou Reyes as Crispin
• Monsour del Rosario as Yuen - Uncle of Beng - descendant of Men Tang
• Blake Nepomuceno as Rudolfo "Rudy"
• Jacq Yu as Miranda/Carmen Santiago - right-hand of Macoy and Benjo's mom (deceased) and the mother of Benjo
• Janice Hung as Kim (deceased)
• Michael Roy Jornales as Beng (deceased)
• Mark Joshua Sayarot as Xander De Vela - has the ability to paralyze people with static through his hands and has the fighting style of a snake. He's Uragon's half-brother (deceased).
• Gee-Ann Abrahan as Kizhia

Special participation

• Jiro Manio as Young Macoy
• John Manalo as Young Waldo
• Jodi Sta. Maria-Lacson as Mrs. Anita C. Ramos (deceased) - Mother of Lem and Baby
• Vice Ganda as Hum the Horse -The Saver of Kids who encountered the protagonists when the kids did not know they have superpowers
• Precious Lara Quigaman as Shen Li Liang - The Golden Statue Goddess
• Menggie Cobarrubias as Sen. Federico Alvarez - Karen's father
• Jordan Herrera as Men Tang
• Cristy Fermin as voice of Maneki Neko (Golden Cat Statue) - Maneki assumes a human form and joins the Kung Fu Kids
• Ervin Bobadilla as The Owner of Magic Crystal
• Ogie Diaz as voice of Maneganeki Maneko (Black Cat Statue)
• Makisig Morales as voice of Borat 1 (Red)
• Rhap Salazar as voice of Borat 2 (Orange) Replaced by Pocholo Gonzales
• Lolita Tamayo as Lourdes "Olud" Ramos - Grandma of Lem, Baby, and Gian
• Alannah Ong as Ma Bang
• Lindsay Custodio as Fiona - Guardian of Mt. Banahaw Lake and Chalice of Life
• Richard Quan as Joselito De Vela - Father of Uragon and Xander (deceased)
• Michelle Salas as Mrs. Alyson De Vela - Mother of Xander
• Japoy Lizardo as Shao - Ally of Yuen, Brother of Fei. He teaches Lem his Kung Fu skills.(deceased)
• Nanding Josef as Mr. Ong
• Mark Gil as Master Wu Lee - father of Kung Lee
• Jana Aveleda & Jenny Aveleda as Cornelia and Ophelia De Vela - Twin Sisters/Cousins of Uragon
• Chiqui del Carmen as Brent
• Kitkat as Malena - Mermaid (knows where to locate the vanishing island)
• Sharlene San Pedro as Reyna Ungga Ungga - A tribe leader: Queen in the island of "isle submerge appear (islang lulubog lilitaw)" and has the fighting style of a monkey
• Erika Anissa Yu as Princess

Six Magical Items that Shen Li Liang Needs

• Sitar - a guitar-like musical instrument from India that hypnotizes anyone who hears its sound.
• Golden Scarab of Jafar (Scarab ni Jafar) - a beetle from Ancient Egypt that takes control of humans and makes them be abused with power. For it to turn back to a stone it must be used for good.
• Chalice of life (Kupita ng Buhay) - a cup from Europe that if anyone drinks from it he or she will be immortal as long as how many times it is drunk and also heals sickness.
• Magical Lotus Flower (Mahiwagang Bulaklak ng Lotus) - a lotus-like object that can bring inanimate objects to life.
• Scythe of Death (Karit ni Kamatayan) - a black scythe from Japan that turns into an ordinary sickle or a black toga that cannot be taken off when held by a person. It tells a prophecy when a person dies. The only way to take it off is to surrender it to Shen Li Liang. Lem is the fishboy that wears the toga of death to become an Angel of Death, he has the power to foretell anyone who is about to die to have a power of the sickle.
• Skeleton Key (Kalansay na Susi) - a key of a pirate that can transport anyone to a desirable place. The key has a special power - to see the answer that one's heart has so long to find.

Lem's transfiguration

Only Lem can see the mark X with someone's forehead

• 1. Teban: Chief shoots Teban's back in front of Waldo Sr. with Lem.
• 2. Miranda: Miranda dies from a fight with Yuen to protect her son, Benjo.
• 3. Chubbs: He was caught in a fight by bullies but survived when Lem surrendered the Scythe of Death to Shen Li Liang.

Other

• Onyx heart of Shen Li Liang
• Ruby heart of Shen Li Liang
• Jade heart of Shen Li Liang

Master Kung tells stories

Master Kung with Fei (Flashback)/Kung Fu Kids

• Onyx & Ruby hearts - (Onyx, Ruby, and Jade hearts) - Master Kung tells Lem about Shen Li Liang. Mr. Ong has a figurine with an Onyx heart, Lem gets it out from Fish Aquarium and gives it to Master Kung. Master Kung has a Ruby heart to give Lem to keep. Someone took the Jade heart from the boy.
• Golden Scarab of Jafar - Flying to find Lem looked like Fei to control it.
• Chalice of life - According to Xander's story Fiona had the Chalice of life/the Kung Fu Kids were heading to Mt. Banahaw with Master Kung.
• Magical Lotus Flower - the Kung Fu Kids go to a Festival for something that has a Lotus Flower with Master Kung.
• Scythe of Death - Shao told Lem about the Scythe. Lem goes with Master Kung to his Grandma's house which has a black scythe or sickle.
• Skeleton key - Master Kung tells Lem the story of the Skeleton Key. Master Kung tells Lem that the skeleton key can be found in an island that appears, disappears, then appears. Maneki tells Lem and the other Kung Fu Kids that they can consult the only mermaid who only knows where the disappearing island is. - the Kung Fu Kids go to the Island with Kevin to find the Mermaid. Master Kung gave it to Reyna to keep waiting for fishboy.