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Papa Zola fails every student for the math exam that Adu Du disrupted and makes an extra class obligatory for every student, including the absent Adu Du. Meanwhile, Adu Du unsuccessfully attempts to reactivate Probe using Petai's power core, so Computer and Lawn Mower contact Bago Go, who tells Adu Du that he needs to buy a power converter to make a power core that fits Probe's old model. In order to pay Bago Go with cocoa, Adu Du sics the Cocoa Jumbo on Tok Aba's Cocoa Shop.

Contrary to his name, Cocoa Jumbo is too small to attack Tok Aba's Cocoa Shop. Instead, Tok Aba, BoBoiBoy, and Gopal agree to help Adu Du restore Probe if Adu Du becomes a good person and attends class with them. BoBoiBoy, Gopal, and Adu Du help people in the neighborhood in order to raise money to buy the five barrels of cocoa that Adu Du needs. Adu Du acquires the power converter from Bago Go, creates a new power core for Probe, and starts reactivating him.

Probe's reactivation is apparently unsuccessful. BoBoiBoy, Gopal, and Adu Du receive the news that Cocoa Jumbo, who has become gigantic by eating cocoa, is rampaging on the island. They are unable to defeat him, but Probe in a new battle mode appears and defeats Cocoa Jumbo. However, Probe doesn't have his old memory and nearly attacks BoBoiBoy and Gopal until Adu Du restores his memory by throwing a mug at him.

Adu Du and Probe contact Bago Go to ask for help because Probe still has memory issues. Bago Go sends his identical doctor brother Baga Ga to Adu Du and Probe. Baga Ga pretends that he is using expensive medical method to cure Probe, while he actually just fixes some disconnected wires inside Probe. After Baga Ga leaves, Bago Go arrives, causing Probe to suspect that he is Baga Ga and threatens to shoot him. Bago Go admits that Baga Ga scammed them, and gives back the money that Baga Ga took and their spaceship as an apology. However, Baga Ga is revealed to be Bago Go's brother, prompting Probe to shoot both.

On the moon, the Five Sly Scammers form a robot from their spaceships, so BoBoiBoy and friends do the same with Adu Du's. However, Adu Du's spaceship robot is outdated, so Yaya and Ying use their powers so it can fight properly. When the scammers' robot beats Adu Du's, Gopal turns some rocks into a pile of gold to distract the greedy scammers while Adu Du hijacks their robot and stomps them with it.

Papa Zola misses his wife Mama Zila, so BoBoiBoy, Gopal, and Papa Zola reuse Adu Du's technology to enter a Papa Zola video game so they can bring Mama Zila out of it. However, when they reach the final level and bring Mama Zila to the real world, Mama Zila is angered by the room's messiness and turns into a monster.

Mama Zila goes on a rampage in the city, trying to make everything ordered the way she likes. As Papa Zola doesn't want Mama Zila to get hurt, BoBoiBoy exhausts her instead before bringing her back to the game, where they properly defeat her. When Mama Zila is brought to the real world again, everyone cleans up the room in order not to anger her.

Adu Du is visited by his mom, who is disappointed that Adu Du doesn't want her help and that he has become good. Adu Du's mother promptly attacks BoBoiBoy and his friends, whom she blames for turning Adu Du into a good person. During the fight, Adu Du's mother exaggerated how hard BoBoiBoy hit her, angering Adu Du who swears revenge on BoBoiBoy.

Before returning home, Adu Du's mother gifts him a credit card with unlimited money, allowing him to fund his revenge against BoBoiBoy. On the next school day, Adu Du goes to school, pretending like nothing happened. When Papa Zola starts another exam, the school is suddenly attacked by Pango Robot.

Pango Robot is piloted by Rob, Robert, and Roberto whom Adu Du secretly freed. Pango Robot is helped by Onion Monster whose smell can make everyone cry. While Pango Robot and Onion Monster are driven away by BoBoiBoy and friends, Adu Du secretly obtain samples of BoBoiBoy's elemental weapons, fingerprints, tears, and hair.

BoBoiBoy has been feeling exhausted lately due to helping so many people and has nightmares about an arsonist. He and his friends realize that many fire incidents have been happening in the island, so they investigate who could be the culprit. While reviewing a security footage, they find out that Adu Du and Probe were at the school's warehouse at night when a fire started there. Upon being interrogated, Adu Du admits that he has become evil again, although he reveals that it was not him who started the fire, rather the arsonist was BoBoiBoy himself.

In order to verify Adu Du's claim, BoBoiBoy's friends and Tok Aba watch over him sleeping. BoBoiBoy indeed turns into BoBoiBoy Fire when sleeping, but he explains that the fires were not intentional and he just wants to have fun after helping so many people. Adu Du and Probe attacks them and although BoBoiBoy Fire defeat them, they manage to get a sample of BoBoiBoy's fire power.

Adu Du announces to the entire Rintis Island that BoBoiBoy is the arsonist. Adu Du argues that they need a new superhero and introduces BoBoiBot, a robotic replica of BoBoiBoy. BoBoiBot demonstrates not only how it is stronger than BoBoiBoy, but how it can control his fire power unlike BoBoiBoy.

BoBoiBoy and BoBoiBot compete on who can help people better, with BoBoiBot outshining BoBoiBoy every time. Once the citizens rely on BoBoiBot, Adu Du starts charging expensive fees for BoBoiBot's service and eventually extorts them. Meanwhile, Probe is jealous that BoBoiBot has become Adu Du's new favorite robot and tells BoBoiBoy that BoBoiBot's weakness is water.

Ochobot scans BoBoiBoy and confirms that there are untapped water power within him. BoBoiBoy's friend surmise that he needs to be calmed down to awaken his power, something Papa Zola manages to do with a massage. When BoBoiBoy Water turns out to be lazy and unfit, Papa Zola trains him until he is ready to fight BoBoiBot. While BoBoiBoy gains an advantage in his fight against BoBoiBot, he is soon outnumbered when BoBoiBot splits into three.

In spite of being outnumbered, BoBoiBoy Water manages to defeat BoBoiBot. Adu Du uses a sample of BoBoiBoy's water to give BoBoiBot new water power, but this also causes it to look unfit too. Because Adu Du calls it useless, BoBoiBot attempts to use his water power to drown the city. While BoBoiBot has become waterproof, BoBoiBoy realizes that it is vulnerable to being electrocuted through its water, allowing him to destroy BoBoiBot using Thunderstorm power. Meanwhile, in Bago Go's hospital in outer space, Ejo Jo breaks free and proclaims that he is going back for BoBoiBoy.

In class, BoBoiBoy and his classmates are ordered to clean their class as Mama Zila is inspecting them. They then learn how to recycle, as they have to make a project for the National Recycling Day. However, they are interrupted by Shield Monster, who wants to fight BoBoiBoy.

Shield Monster utilizes the surrounding garbage as his shield, so BoBoiBoy and friends clean up the island while fighting him. Adu Du and Probe witness the fight and decide to be Supervillain Jero-Jero whose job is to help evil people like the Shield Monster. BoBoiBoy and friends manage to defeat and capture the Shield Monster and drive Adu Du and Probe away. Meanwhile, Ejo Jo receives the report that Shield Monster has lost and decides to return to Earth.

BoBoiBoy and friends hold an Earth Day Carnival at their school, but Fang suddenly leaves without explanation. Meanwhile, Adu Du and Probe decide to rescue the Shield Monster, who no longer wants to attack BoBoiBoy and just wants to flee. The three destroy the carnival and flee. Before departing in a spaceship, Shield Monster explains to Adu Du and Probe that he was paid by Ejo Jo to gain new data on BoBoiBoy. Meanwhile, Fang secretly responds to a message from outer space.