: Through a flashback, we learn that Jojo was actually the one who pushed the Professor, causing him to accidentally spill Chemical X into the concoction of sugar, spice, and everything nice. While this created the Powerpuff Girls, the resulting explosion also mutated Jojo’s brain, turning him into the super-intelligent Mojo Jojo.
Information on how this origin story differs from the . [S1E7] Major Competition/Mr. Mojo's Rising
: Mojo Jojo tricks the Professor into helping him "improve" himself, claiming he wants to be a hero. He manipulates the Professor's guilt by revealing a secret from the past: before the Girls were created, Mojo was the Professor’s lab assistant, a simple monkey named Jojo . : Through a flashback, we learn that Jojo
: The Girls become frustrated and feel obsolete as the citizens of Townsville quickly abandon them for the shiny new celebrity. However, they soon realize that Major Glory is more of a showman than a selfless protector. : Mojo Jojo tricks the Professor into helping
If you are looking for more specific details, I can provide: from Mojo Jojo's monologues.
In this segment, the Powerpuff Girls face a new kind of threat: a rival superhero who is more interested in fame than actually helping people.
: The Girls eventually reclaim their status by proving that true heroism isn't about the spotlight or the "glory," but about the genuine desire to protect the city, leading to Major Glory's exit from Townsville. Part 2: "Mr. Mojo's Rising"