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 a revival of the original series. The episode features Cathy Cavadini, E.G. Daily, and Tara Strong, reprising their roles as their 1998 incarnations.

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 an old blueprint for an abandoned invention of a dimensional portal (realizing he abandoned the idea as it was unstable). Bubbles peeks above 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 the series, Blossom and Buttercup are fighting over the remote to watch their favorite shows. Their fighting gets interrupted by a crash outside, cause by an unconscious Bubbles from the 2016 universe. 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, 1998 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.

Meanwhile, Silico