Fang is one of main characters in BoBoiBoy.
He makes his first appearance in the Extended Finale, he is seen at the Rintis Railway Station going out of the train when BoBoiBoy is about to enter the train and leave. In Episode 1 of Season 2, he appeared again in Rintis Island Primary School as a student, he also appeared in The Haunted House (Season 2, Episode 2). He is jealous of and angry at BoBoiBoy not only because of his powers but also because of the following :
- While he's come to the class as a new student, Gopal said that BoBoiBoy is more handsome than him.
- On the first day of school, Teacher Papa Zola said that BoBoiBoy is smarter than him
- His classmates says that BoBoiBoy is cuter and more stylish than him.
- When Fang wants to buy his favorite donut at the school canteen but BoBoiBoy got it first.
- When Fang answered the difficult question in mathematic class, Gopal said that "If only BoBoiBoy was here, he will be more clever" and Teacher Papa Zola talked about BoBoiBoy during three hours.
- When Fang cleaned the classroom by himself, he accidentally dropped the broom. He reached to pick it up at the same time as BoBoiBoy entered the room. BoBoiBoy was about to give the broom to Fang when Teacher Papa Zola knocked Fang out of the way and started praising BoBoiBoy for cleaning up the room by himself.
In Season 2, Episode 4 he and BoBoiBoy are challenged by Teacher Papa Zola to play a game of soccer, he teamed up with Adu Du and Probe but lose to BoBoiBoy's Team. He, along with BoBoiBoy and Gopal, were shrunk by Probe's Shrinking Pistol (Season 2, Episode 5) Although still jealous, he tries to become friends with BoBoiBoy.
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In Season 3, Episode 23 he was helping out with the Earth Carnival by handing out pamphlets. He joined the others when they went to go see BoBoiBoy in the classroom but he suddenly left in a hurry when he received a message on his Power Band. Later that night, he is seen in the Haunted House bringing up a hologram of Ejo Jo's ship, apparently contacting the alien, and saying he had received the message and was now ready.
In the final 3 episodes of Season 3, Fang was revealed to be an alien. His real name is "Pang" and he is under the command of Captain Kaizo, the "legendary space rebel" (according to Probe and Adu Du)
He makes his first appearance in the extended finale, but plays a more prominent role in the pilot episode of Season 2 as a new student at Rintis Island Primary School, where he is portrayed to have a cold demeanour as well as a pompous and arrogant attitude. He spoke very few words and he typically avoids speaking or socializing in school. However, beneath his seemingly calm exterior is a fiery temper, which is usually set off upon encountering someone whose popularity and talents rival those of his. He is unable to curb his rage when BoBoiBoy appears to be more popular and is declared to be academically superior to himself.
In Season 2, Episode 6, Fang's mean attitude towards BoBoiBoy and his friends began to lessen and by the end of Season 2, they have all become good friends. Fang’s most prominent flaw is his superficiality. He never misses a chance to boast about his abilities and popularity, and especially regards the latter with great value. However, he is shown to acknowledge his mistakes, as well as to redeem himself instead of running away. He resolves to rescue Ochobot in the end, obtaining his signature power in the process.
He also does seem to want to become friends with BoBoiBoy and the gang, hanging around them even when they were behaving hostilely towards him (upon suspecting him to have harmed Ochobot in some way).
Afte some persuasion from his friends, Fang tried to defy the orders of his superior, Captain Kaizo, to avoid fighting BoBoiBoy, claiming that the latter is his friend.
The kind of power that Ochobot gave to Fang is Shadow Manipulation. The shadow caused a huge dragon that attacked Adu Du and Probe and the whole city. Fang can't stop it, so Ochobot is the only one who could. Fang loses his power when it's sundown or sunset, as it was revealed in Season 2, Episode 2. This is most likely because there is no or limited light source for him to make shadows. However, when he first received his power, he was able to conjure a Shadow Dragon during nighttime. Another time when he used his power during nighttime was during Season 3, Episode 16 when he conjured a Shadow Tiger, Shadow Eagle, Shadow Shield and Shadow Finger Prick.
In Season 3, Episode 24, it is revealed that he unlocked two new forms: Shadow Koala and Shadow Bear. This gives him a total of 16 shadow forms. He also revealed that he was an alien and had the ability to become intangible (untouchable).
- Shadow Tiger (Harimau Bayang) - used to scare and intimidate his enemy. Also for attacks.
- Shadow Scratch (Cakaran Bayang) - used to make the Shadow tiger scratch his foe.
- Shadow Shield (Perisai Bayang) - used to protect himself or others.
- Shadow Shifter (Bentuk Bayang) - use to make a black trail that hit any foes that get in it's way.
- Shadow Attack (Serangan Bayang) - used to creating black mass out of shadows to blast his foes away.
- Shadow Hands (Jari Bayang) - used to trap his enemy.
- Shadow Cocoon (Kokun Bayang) - can be formed by combining the Shadow Hands together.
- Shadow Speed (Gerakan Bayang) - use to run fast by enhancing his legs' movements.
- Shadow Eagle (Elang Bayang)- used to construct an eagle out of shadow as means of transportation, used it to get away from the Crazy Cat.
- Shadow Rat (Tikus Bayang) - used against the crazy Cat.
- Shadow Dragon (Naga Bayang) - his first power, it was formed when Ochobot gave him his power, but Fang can't control it. In Episode 39, Fang used this to break P.E.T.A.I.. Whenever Fang used this, he always faints after he used it.
- Shadow Hallway (Lorong Bayang) - used to protect his classmates.
- Shadow Finger Prick (Tusukan Jari Bayang) - used to dodge the BoBoiBoy Fire's attack in Season 3, Episode 16.
- Shadow Ejo Jo (Ejo Jo Bayang) - When Ejo Jo had Fang's power watch, he used this to attack Papa Zola.
- Shadow Koala (Koala Bayang) - This was used to distract BoBoiBoy Thunderstorm in Season 3, Episode 24 so Fang could attack him with the Shadow Polar Bear.
- Shadow Polar Bear (Polar Bear Bayang) - used to attack BoBoiBoy
- Shadow Golem (Golem Bayang) - Combined with Earth Golem, use to attack Captain Kaizo.
Although Fang's power has manipulated by 14 forms by Season 2, Episode 10, only 5 of them are recognized by Ejo Jo's Computer (Tiger, Hands, Rat, Eagle, Dragon)
- Much more of Fang's backstory is revealed in the final 3 episodes of Season 3.
- Like Ying, Fang also has Chinese descent, as revealed in Season 3, Episode 16, which he sang a lullaby to Boboiboy in Chinese.
- The spelling of his name is Fang, but some people mistake it as Feng, even though that have the same pronunciation.
- It has been hinted throughout the series that ever since he came to Pulau Rintis, he has been living alone in The Haunted House.
- It's unknown how Fang could have known about his power or how to use it since he revealed that he forgot how he got his Power Band in Season 2, Episode 7.
- Before his name is revealed, he was known as the "Mystery Boy" (Budak Misteri) in the credits.
- His favorite food is Red Carrot Donut (Season 2, Episode 3). He loves it to such an extent that whenever he sees a Red Carrot Donut, he will lose his "cool" composure and happily eat it. This is shown in Season 2, Episode 3 and Season 3, Episode 22
- His first design was concept by the ninja which wears penguins costume and it was called "Ninja Boy"
- He has basketball skills (Season 2, Episode 4)
- His birthday is April 13, 2001.
- It was confirmed on Season 3, Episode 24, Fang is not a human being but truly an alien, like Captain Kaizo.
- Fang revealed that when he taps the logo on his glasses a mask forms on his face and gives him the ability to become intangible.
- Fang revealed that Captain Kaizo is his older brother in Season 3, Episode 26.