Karl

Karl is a self-proclaimed fanaloka genius and is an antagonist in the All Hail King Julien Netflix series.

History
Part of Karl's history mentioned that he has a brother named Bruce who was better at things than him.

After he did some attempts on King Julien's life where Mort took a blow to every attempt, Karl makes himself known to King Julien and invites him to his lair with the directs on the brochure.

After Clover and Maurice are captured, King Julien makes his way to Karl's lair at a crashed zeppelin where Karl mentions his plans to raise the zeppelin and take over the world with King Julien as his partner. While Karl was ranting about his plans, King Julien manages to free Clover and Maurice.

When King Julien, Clover, and Maurice exit the zeppelin, they are confronted by Karl who prepares to fire a laser at him until the balloon carrying the rocks with every wishes that the lemurs wrote on them for the Sky God member Frank falls from the sky and lands on Karl. Seeing his "Surprise Me" wish roll against him, King Julien took it as a sign that Frank had helped him defeat Karl.

Personality
Karl is an eloquent yet violent enemy of King Julien's. He obsesses over Julien to the point of leaving deadly traps and appearing in his bedroom late at night, multiple times, without alerting anyone. Despite his flamboyant and playful nature, Karl seems well trained in the art of combat, enough so to defeat Clover in a matter of seconds. He seems to have selective hearing, as he ignores a lot of what others say in favor of furthering the conversation. Karl's speech is often ominous, as he ends many of his sentences with "not yet, at least" or "for now". Although Karl exudes an air of confidence, he eventually reveals to Julien that no one has ever taken him seriously, and that his older brother was always favored over him.

Skills and Weaknesses
Karl is a talented trap setter, enough so to set various traps for Julien, a lot of which were deadly. Also, he is able to train even the deadliest animals, like crocodiles for example. He is capable of entering Julien's room (and presumably, other places) without leaving any hint of his presence until he wants it to be revealed. He managed to both incapacitate as well as capture Clover in less than a minute and can communicate to a hissing cockroach, Chauncey, who acts as his spy. It is implied, potentially for humor, that Karl has experience in graphic design, as he designed his own font (which he refers to as "Karlvectica"). Karl also has an inexplicable ability to light candles on mental command, though this mostly seems to be for effect.

Despite wanting to be recognized as the "greatest mind in all of Madagascar", Karl is capable of being outsmarted. Julien's behavior takes him off guard on multiple occasions, to the point of Julien actually leaving the room while Karl is talking to him without him even noticing. He also seems to have an inner-lying sense of low self esteem, which Julien regards as his "issues".

Role in the series
Karl reprises his role in the series as a villain, taking advantage of King Julien's departure with his Uncle King Julian XII and has been attacking the lemur community with Clover in charge until an unexpected incident caused both Julien XII and Karl, along with his pet cockroach Chauncey, to be sent to the Hoboken Zoo and save the lemurs.