The Narrator is the off-screen announcer of The Powerpuff Girls. He was voiced by the late Ernie Anderson in the "What a Cartoon" shorts, and by Tom Kenny in the series proper.
Unlike most narrators in fiction, he shows true emotions like joy, confusion, depression and boredom.
The Narrator also claims he can roll his tongue, it is unknown if this is true or not.
Every once in a while, he interacts with some of the characters, but this doesn't seem to really affect much of the plot. It's also shown that he can also be affected by the events throughout an episode--a good example being when he was affected by HIM's hate gas in "Tough Love" and, despite him not actually fighting the girls, he still threw insults at them and at the end of the episode, he asked a nurse for a sponge bath, implying he might have been beaten up by the girls at one point. Another example is "Monkey See Doggy Do" where he shows his rage against Mojo Jojo for turning every citizen in Townsville (eventually the whole world) into dogs. He was also turned into a dog when he was zapped by Mojo Jojo's stolen Anubis Head. He does turn back to his normal self at the end, though.
He is an all-powerful force in the Powerpuff Girls universe. When Mojo Jojo took over as Narrator in "Simian Says", he was able to control the weather and could make the girls do anything he wished until the girls got the real Narrator his power back. The girls also talked to the Narrator, implying that he could be seen. Buttercup also stated "I knew something was missing!", which could mean that the Powerpuff Girls knew the Narrator.
In the beginning of each episode, the Narrator almost always starts with "The City of Townsville..." and ends with "And so once again, the day is saved thanks to... The Powerpuff Girls." Though there have been exceptions, like in the episode "Custody Battle" where he ends with "And so with Mojo and HIM finally happy together, the day is doomed, thanks to The Rowdyruff Boys" since the episode mainly focuses on the boys. (N.B.: The hearts in the ending shot were replaced by a skull and crossbones with black and white background and the "The End" text is in dark red color instead of the standard pink. In "Twisted Sister", he ends with "And so for the first... and final time, the day is saved, thanks to Powerpuff Bunny." In "Him Diddle Riddle", he ends in confusion along with the girls standing in confusion saying "And so...ugh...hmm...ya". In "Los Dos Mojos", he ends with "So once again the day is saved, thanks to Mojo-Bubbles...th...th.. the Powerpuff..." and starts talking like Mojo Jojo in the following phrases "Ah, heck, the day was saved. So says me, the Narrator. So called because I speak the narrative of the story! I advance the plot! I begin and end each episode of The Powerpuff Girls. Me, the Narrator!". In The Headsucker's Moxy, he did not complete his usual ending line since his head hurts. In Telephonies He ends with "So once again the day is saved... thanks to Mojo, Fuzzy and HIM?". There are also instances where he ends with Mojo Jojo saving the day such as "Mr. Mojo's Rising", "Just Another Manic Mojo", "Get Back Jojo", "Telephonies (along with Fuzzy Lumpkins and 'Him')" and "Forced Kin". In a Florida SuperCon conference, he ends with "So once again, the day is saved, thanks to this big goofy peanut guy, Goofy Goober, Spongebob Squarepants!"
Powerpuff Girls Z Appearances
In Powerpuff Girls Z, the narrator doesn't speak that much as the original cartoon, and he's voiced by Sam Vincent.
The Powerpuff Girls (2016) Appearances
In the 2016 reboot, the narrator is voiced by Tom Kenny, like in the original cartoon. However, unlike the original cartoon, he doesn't speak as often, and does the opening and ending narrations from the original only on a few occasions. He does make a prominent appearance in "TTG v PPG", most notably parodying the end sequence: "And so once again, the day is saved no thanks to... The Teen Titans! Seriously, what is wrong with those guys?"
As of this series, it seems likely that they are no longer using the narrator for the duration of the series.