At the night in Rintis Island Prison, the security was bring Rob, Robert, and Roberto the dish of Turmeric rice for them. The Criminal want to get and order, but they been deceived. Suddenly, Probe that disguised as the security was ordering a big cake as a surprise for them. The Criminals was confused. When Roberto want to read it, Rob was eating the part of cake. Robert was read that they need to wait the suprise in 3 AM. To see the surprise, Roberto was keep standing while the rest was sleep. At 3 AM, Adu Du was crack the wall and free The Criminal. Roberto was asked about the action, but Adu Du were apologized and give them a quest to vanish, squash, mash, mane, destroy and kill BoBoiBoy. The Criminals were confused about the quest because BoBoiBoy was a superhero that has power. Adu Du solve their question by give them Pango Robot to attack the school.
In Adu Du's Bunker, they was plan to destroy BoBoiBoy by taking the sample of Thunder Blade, Cyclone Hoverboard, Earth Golem, BoBoiBoy's Hair, BoBoiBoy's tear, and BoBoiBoy's fingerprint. The Criminals were confused, but Probe share the idea by using his book, but Adu Du refused in order to create a monster by mutating the Onion.
The Onion Monster release his Onion Wave and make the heroes was cry and cold. Yaya and Ying close their nose and eyes that saved them from the gas. Ying said that she always help her mother to cut the onion and Yaya added by closing their nose while chop the onion. Yaya also added by crushing the onion as the ingredient of her biscuits. Yaya and Ying create the combo by combining Gravity Sinker with Thousand Speed Kick and added with Powerful Punch, but Pango defend the monster and he also using his tongue and throw Yaya away. Fang attack him with Shadow Attack, but the robot was rolling as Spinning Rolling. Fang added with Shadow Tiger, but they run together and got rolled. The Onion Monster attack Gopal by using Onion Ring Attack and trap him by Onion Maximum Aura. Yaya then give BoBoiBoy her glasses and clip. BoBoiBoy release his power and attack Pango Robot with Earth Golem. Probe was taking the pieces and home to the headquarter box. BoBoiBoy Cyclone and BoBoiBoy Thunderstorm combine their powers into the Cyclone and Thunderstorm Combo Drill Movement and attack the robot. The Onion Monster try to release the ring, but Gopal change it to Onion Ring. He also bring Canteen Lady that scare the monster. The Monster pretend to fly, but defeated by Yaya using Collision Punch and fall together with Pango's cracked shield. Adu Du was come to BoBoiBoy with the Glove Scanner and got BoBoiBoy's fingerprint. Back to his lab, Adu Du finally finished his experiment and created BoBoiBot.
- This is the Robot Pango and the Onion Monster's first appearance.
- This is Rob, Robert, and Roberto's second appearance with the first being Rob, Robert & Roberto's Robbery
- It's revealed Adu Du sends Robot Pango and Onion Monster just to collect sample of Thunder Blade, Cyclone Hoverboard, Earth Golem, BoBoiBoy's Hair, BoBoiBoy's tear, and BoBoiBoy's fingerprint to create BoBoiBot, a BoBoiBoy Robot.