Powerpuff Power Hour

"Powerpuff Power Hour" is the series finale of the Powerpuff Girls reboot. The episode is written by writers of the original series Amy Keating Rogers and Randy Myers. It is a crossover with original 1998 series. The episode is set air on November 18, 2018, to commemorate the original series' twentieth anniversary. The series finale of the reboot leads to another revival of the original series.

In the episode, the Professor creates a dimensional portal, in which the Girls enter the 1998 incarnation of her home and meet their counterparts. Meanwhile, Silico is set on destroying the 2016 universe, followed by the 1998 one.

Plot
The Professor finds old blueprints for an abandoned invention of a dimensional portal (realizing he abandoned the idea as it was unstable). Bubbles peeks over him and tells the sisters about it, which they supplicate him to. A few weeks later, it was finished. The Professor warns the Girls to not use it. However, Bubbles breaks her promise. When the Professor goes to the store, bringing Blossom and Buttercup along, Bubbles stays home and uses it. After turning it on, it sucks her in.

In the 1998 universe of Townsville, Blossom and Buttercup fight over the remote to watch their favorite shows. Their fighting gets interrupted by a crash outside, cause by an unconscious 2016 Bubbles. Both of the sisters discover it and mistake her as their Bubbles. When she claims that she came from another dimension, they believe that she hit her head after landing, suffering from amnesia. Fortunately, '98 Bubbles returns from assisting the Mayor. She then notices her 2016 self and exclaims for the Professor.

Meanwhile, the Professor and the sisters come home and find Bubbles absent. Hearing a humming sound in the lab, they discover Bubbles has used the time machine. He and the girls go in the '98 universe to get her back. At Pokey Oaks Kindergarten, '98 Bubbles shows her other self for show-and-tell. After school, Bubbles befriends her '98 self, but ragingly says her voice is annoying to her response.

Climax: The 2016 universe's fading catches up with them, and only have about nine minutes to get there.

Ending: The 2016 and 1998 incarnations stop Silico, but the fade catches up more with 2016 Blossom and Buttercup, however, Bubbles and the '98 Girls stop him in time, although Bubbles' universe finally ceases to exist. Before her entire body fades, she wishes her world and her sisters should have been more like the 1998 universe and Girls. After fading away, The '98 Girls turn off the machine and destroy it. Noticing the news, the villains have broken out of jail. The Girls avenge their counterparts deaths by fighting off their enemies.

The episode then concludes with the narrator saying "So, for the final time, the day is saved! Thanks to the 'modern' Powerpuff Girls!"

Trivia

 * The episode features Cathy Cavadini, E.G. Daily, and Tara Strong, reprising their roles as their 1998 incarnations.