Tamka is a bulky green crocodile, with a large dark green spot at the end of his long snout, coupled with smaller markings of the same color also on his snout. The bottom of his black eyes green. Some light green markings reside on the side of his ribs. His underbelly is also light green, with a couple of dark spots near his chin. At the end of his tail is a light green stripe, and his tail is tipped with the same shade of green. His scales are dark green, and his claws are black.
Tamka is shown to be overconfident, and lacking in intelligence. He even confesses to the Lion Guard that he himself is not smart. Despite his physical stature, Tamka has been shown to be rather weak, with Kion able to take him down without any problems, despite his bulk.
When Ono guides a group of Sable Antelopes down a dead end canyon to help calm them, he accidentally wakes Makuu's Float in the process. Tamka witnesses a mild dispute between his leader, Makuu and fellow float member Kiburi, as the pair argues over the next step, concerned about being awake during the Dry Season. Although Kiburi wishes to punish Ono for his actions, Makuu dismisses his suggestion, leaving to speak with Simba over a new water supply. Nduli watches as Kiburi insists they spread out and find their own water because they're crocodiles. Tamka insists that he's right and follows him to find a new water source.
When Makuu returns, he is furious that they disobeyed a direct order, especially since he and Simba have found them a water supply. The
Lion Guard leads them to their new water source, which leads to overcrowding. Tamka watches in shock as Kiburi challenges Makuu to a Mashindano.
At the Mashindano, Ushari suggests a scheme which could help the crocodiles take over the Pride Lands. They agree to go along with it, with Tamka, Nduli and another float agreeing to take down assasinate Simba while Kiburi participates in the Mashindano. But as the three traitors leave, they are spotted by Ono, who alerts the rest of the Lion Guard. Before they can strike, the Lion Guard catch them off guard. Tamka challenges Kion but is pinned down by the cub. When Simba discovers the crocodiles, he is furious.As the Mashindano ends, Kiburi announces that King Simba has been taken down by his crocs, but is shocked when the King reveals himself. Makuu assures Simba that he had no knowledge of their plan, and banishes not just Kiburi, but also Tamka Nduli and the croc from the float, handing their punishment over to Simba. Simba then banishes them from the Pride Lands, and the group leaves.In the Outlands, they meet up with Ushari, who leads them to a volcano with the promise of something amazing. Here, they meet Scar, who begins to tell them of a plan that he has, which will allow them all to take over the Pride Lands.
Tamka and his float hear from Njano about a potential new member for the float named Hodari, who is friends with the Lion Guard and who could possibly help them get back into the Pride Lands. When Hodari appears, they are shocked to see that he's a gecko and not a crocodile. They go along with the plan, though Kiburi tells Hodari that he still needs to pass a test. Hodari already knows about the Traditional Crocodile Initiation Spar, and Kiburi calls forth Tamka to challenge him, while he and the other float members watch. Just before they engage in combat, Kiburi orders Tamka to let him win. Although confused, he does as commanded, and Hodari is overjoyed to be confirmed as a member of Kiburi's float. Kiburi proceeds to lead his float into the Pride Lands.However, they don't get too far and are ordered to return. Tamka is as furious as his leader that the plan didn't work. When Hodari returns, Tamka doubts his usefulness, though Kiburi still sees the potential. He asks if he can remember any of Makuu's new moves, and Hodari obliges.
Armed with that new knowledge, Kiburi leads his float back to the Pride Lands, waiting for the Lion Guard to leave Makuu's float. When they do so, Tamka and his float approach Makuu's float and they engage in combat. Having learned all their moves from Hodari, Kiburi's float is easily able to counter the moves from Makuu's float members. The Lion Guard arrive to assist Makuu's float, shortly before Kiburi pins Makuu down. Kion tries to save him but is stopped by Tamka. He laughs at the cub, who strikes him twice more, ultimately defeating him.Tamka is eventually joined by his leader, defeated by the Lion Guard and Hodari, who Kiburi had betrayed. Kion initiates his Roar of the Elders to send them back to the Outlands.
When the Lion Guard comes to the Outlands to find the ash for Simba, Kiburi's Float starts to fight with them and Tamka is among them but the guard defeats are able to defeat the float and they continue their mission. When Scar calls out for his army Tamka is one of the many villains on his side who helps corner the guard until he, Kenge, his float, Ushari and the skinks are all blasted away by Kion’s roar.
Tamka and Nduli are wondering why they can't go to the big meeting with Kiburi, Janja, and Reirei. Tamka and Nduli start thinking about what they want to eat, and they spot Thurston sleeping alone in the Outlands. They try to sneak up on him, but Nduli steps on a stick and it wakes him up. He explains how he's going to a "party" with his hyena friends.
The crocs ask about the Lion Guard's weakness, and Thuston explains if they rub their tummies, it'll make them sleepy. They go try it, but nothing works, particularly when Nduli's rubbing Beshte's tummy tickles it. Kion gets mad and uses the Roar of the Elders, blowing them away. They head back to the Outlands and find Cheezi, Chungu, and Goigoi talking about the crazy zebra. They decide to just eat him, but they keep fighting on what part of him they want to eat. The Lion Guard arrives to protect Thurston, which starts a fight. The Guard ultimately wins and the members of Scar's army retreat, including Tamka.
After hearing that Jasiri and her Hyena Resistance are foiling his plans, Scar orders his army to stop them, including Tamka. They manage to outnumber the Resistance, but the Lion Guard arrives and fights them with the hyenas. Tamka, along with the rest of the army, is eventually driven off and blown away by Kion using the Roar.
The Army of Scar faces off with Basi's Pod in an attempt to take over Big Springs, and Tamka is with Kiburi. The Lion Guard and gorilla warrior Shujaa arrive to stop them, and Shujaa hurls rocks at Kiburi and Tamka. The army is scared off and they report their troubling issues to Scar; however, he learns about Shujaa's incredible displays of strength and he explains how they can use it to destroy the Pride Lands.
Later, Tamka and the rest of the army come back and attempt to sneak up on the sable antelopes, but Shujaa and the Lion Guard arrive to stop them. Shujaa nearly attacks them again, but this time, Kion uses the Roar to blast Tamka and his allies away.
However, Tamka and the army soon come back, and attack Basi's Pod as the area is in flames. Beshte charges at Kiburi and Tamka, sending them flying back. The army takes advantage when the hippo injures his leg, continuing their rampage until Shujaa returns, having learned to control his strength. He picks up Kiburi and Tamka when they confront Bunga, slams them into the ground, picks them up again, and throws them in the direction of the Outlands. The army soon gives up and retreats, and Shujaa is praised for his efforts.