Timon is a skinny pale tannish-brown meerkat with a vaguely triangle-shaped head and cream-colored underbelly and palms. A line of longer fur is present on his chest, and excess fur on his elbows form triangular points. On his head is an orange-red tuft of fur, and this same color covers the back of his head. On his back, he has five short horizontal stripes that are several shades darker than his predominant color. His eyelids, hind paws, and digits are a dark brown, as well as the tips of both his tail and ears. His large, shiny nose is brown as well, though a darker shade than the rest. Unlike a lot of other characters, Timon doesn't have colored pupils - his are black.
Timon lives a carefree life, and follows the motto "Hakuna Matata", which means "no worries". He is always laid-back and enjoys eating bugs like his friend Pumbaa. He detests work, preferring to just relax. He is shown to care greatly for his adoptive nephew Bunga and adopted son Simba. He becomes very upset when either one of them is in danger..
Timon is also impatient, and doesn't like it when he is not listened to. He becomes panicky in stressful situations.
Timon, along with Pumbaa, found Simba, who had passed out under the heat of the desert. The pair brought him back to their jungle home and raised him, showing him the kind of king he could be. When Simba traveled back to the Pride Lands to battle his evil uncle Scar, the pair went with him to help fight and reclaim the Pride Lands.
Timon and Pumbaa were walking through the Pride Lands in search of Utamu grubs when a very young honey badger approached them. Pumbaa wanted to keep him, but Timon protested, pointing out that they had already raised a lion. He sent the honey badger off to gather grubs in the hopes of getting rid of him, but the honey badger was quick to return with his findings. Timon thanked him, and continued on his search for the Utamu. The honey badger followed him, and was able to find Utamu grubs for Timon and Pumbaa by climbing up a dead tree. Timon was very grateful, and he decided to keep the honey badger, calling him by the name of Bunga.
Timon and Pumbaa arrive after they hear Zuri in distress. Together, they manage to get her free, just as Bunga arrives. When Zuri falls into a log full of bugs, the pair leap down to feast, and Timon even manages to find an additional bug from the back of Zuri's ear. Bunga is excited to tell them of his new role in the Lion Guard, and proceeds to announce it to the world. Both are at first largely concerned about this, with Timon's fear leaning towards the extra work it would require. Bunga reminds them of Zuka Zama, but Timon is still dubious. However, after Kion explains that Bunga is the bravest animal he knows, both Timon and Pumbaa come to accept his new role.
Timon and Pumbaa are informed of Bunga's odor problem by Ono. However, they don't believe there's anything wrong with Bunga's scent. They argue with Ono over Bunga's smell in the song Don't Make a Stink.
Upon hearing Rafiki's unfinished statement about the intelligence of honey badgers, Bunga races away to tell Timon and Pumbaa. Together the three of them popularize advice from Bunga, calling him "Bunga the Wise" and "the sage of Hakuna Matata Falls". When the Lion Guard comes in search of Bunga, they find Timon and Pumbaa, who sing the song Bunga the Wise to introduce Bunga to the Pride Landers seeking advice. When the Lion Guard asks to see Bunga, Timon is reluctant to allow them in, but Bunga calls his friends inside. However, before the Guard can say much to Bunga, Timon ushers them out, pointing out the many animals waiting.
Later, Timon is seen as part of the parade of animals following Bunga through the Pride Lands. When the Lion Guard asks what they are doing, Timon and Pumbaa explain that Bunga's advice had become so popular, they wanted to spread it around. Kion tries to convince Bunga to stop, and Timon protests, reminding him of Bunga's idea of the dam. Just then, the dam breaks, and Timon and Pumbaa flee for safety. Kion eventually uses the Roar of the Elders to stop the water from flooding the Pride Lands. Timon is last seen relaxing on Pumbaa near the waterfall Kion created with his roar.
After Bunga is bitten by Ushari, Ono goes to tell Timon and Pumbaa. By the time the Lion Guard gets Bunga to Rafiki, Timon is already panicky. He is shocked when Rafiki says that he plans to do nothing about Bunga's wound, but when Rafiki reveals that honey badgers are immune to snakebites, Timon is delighted. He invites the Lion Guard from to dinner at Hakuna Matata Falls, but they all deny. Upon hearing from Fuli that female cheetahs prefer to hunt alone, he insists on inviting Fuli, and she reluctantly accepts.
At dinner with Fuli, Timon offers her a wide variety of bugs. Fuli is disgusted, but Timon decides that the issue is that Fuli is not being engaged in dinner conversation. He attempts to chat with her, but ends up marveling at how soft her fur is, even inviting Pumbaa to come feel it. Fuli says that she doesn't like it when others touch her fur, and eventually makes a quick retreat.
Bunga explains to the Lion Guard (sans Fuli) how he met his uncles. Later, he returns to Hakuna Matata Falls without the Utamu grubs. Although Bunga is bitterly disappointed, neither meerkat nor warthog are upset. The only reason they shared the Utamu grubs was to celebrate their meeting with Bunga. And, as it turned out, the grubs had landed near them anyway (thanks to Bunga's earlier antics). They share a loving hug before diving into the grubs.
Timon is shown sobbing in despair in Nandembo Caverns, leaning against Pumbaa and calling the savanna cruel for taking both of his babies in the very same day. He then falls to the ground, pounding it with paws, and announcing that they are lost in a crazy maze. He then covers his eyes and weeps louder.
Ono points out that the entrance to the cave is very close. Timon is not calmed by this, and shouts that they are already lost despite barely being inside. He then wails, "My kids!" and frets about what horrors they are enduring whilst tugging his ears down.
Simba and Bunga hear Timon squalling and referring to them as his lost babies. However, he has calmed down by the time he is next shown. He apologizes to Kion for losing it, Pumbaa tells Kion he'll understand once he has kids of his own. Timon, on the verge of tears and sniffling, adds that you let them into your heart. He is unable to finish his sentence, and begins sobbing once more. Simba and Bunga shout Timon and Pumbaa's names, and Timon whimpers that he can still hear their "sweet, sweet" voices before bursting into tears. Realizing that Bunga and Simba still live, he and Pumbaa run in the direction of their voices. They run one way, encounter a dead end, and run another way.
Once Simba and Bunga leap across a chasm and join the Guard, Pumbaa, and Timon, Timon begins kissing Bunga on the cheek. He remarks to Pumbaa that Pumbaa thought they would never find them. The party goes to the elephants' concert, where Simba declares that he will sing a song that means a lot to all of his family. He glances as Timon, Pumbaa, and Bunga, and Timon smiles with his paws holded against his chest. The group then sings the song Hakuna Matata.
Timon and Pumbaa are seen briefly during Life in the Pride Lands. As Beshte passes by whilst giving Ajabu a tour of the Pride Lands, Timon is resting on top of his warthog companion. When Beshte calls to the pair, Timon leaps up and sends a wave their way.
At Hakuna Matata Falls, Timon scrapes a stick against some rocks to get the attention of the Lion Guard and some young animals. He instructs them to let the expert tell them about The Zimwi. Pumbaa insists that Timon is the only animal to have survived and encounter with and seen the beast, and Timon agrees, but grins and adds "more or less." When Kion proves doubtful, Timon explains that his Ma's cousin's friend knew an ox who told him that he ran into The Zimwi and got eaten. Kion wonders how the eaten ox could have passed on the tale, and Timon informs him that he'd have to ask the ox, then declares that nothing can stop the Zimwi. Young Rhino asks what they're going to do, only to have Timon tell him that there's nothing he can do. The Guard leaves to go track down the Zimwi.
As Ma Tembo prepares everyone in Mizimu Grove for the Ukumbusho Tradition with the Lion Guard's help, Timon and Pumbaa show up, willing to help out too, with Pumbaa claiming that Timon is a professional in theatrics. Despite her doubts, she allows them to assist in helping the Guard prepare for the celebration.
Before they begin, Ma Tembo remembers that the Lion Guard has traditionally been made up of lions, prompting Makini to offer to paint them instead. After she is finished, Timon and Pumbaa introduce the new Fuli to them personally. As Fuli starts to feel bad, Timon tries to assure her, but ends up snuggling her soft fur. After pushing him away, Timon and Pumbaa start to coach the Guard as they had intended.
However, Timon and Pumbaa's ways of coaching the Guard are met with little success. Despite assuring them that
they know more about how lions act than anyone in the Pride Lands, having raised Simba, they are unable help them, especially when they try to practice their lines with the branch of peace in their mouths, much to Timon's frustration.
Later that evening, Timon and Pumbaa sit with Makini as the event goes underway, until a swarm of bees show up and frighten the elephants away. Timon angrily calls for them not to improvise, but the elephants run regardless. When the Guard saves the herd from the swarm and bring them back safely, the celebration continues once again.
Timon appears in the comic with Pumbaa looking for grubs in the jungle near Janja's Clans den in the Outlands and were taken as prisoners. After Kion and the guard frees Bunga's uncles they safely make their way back to the Pride Lands with Janja and his hyenas having to deal with termites or lava.