This was supposed to be a full-length episode, originally titled "Mo' Lingual". However, the production crew subsequently edited it down to a typical 11-minute episode.
The physical appearances of the Run-Of-The-Mill-Girls are based on redesigns that Craig McCracken
briefly considered for the Powerpuff Girls in response to negative reactions from test audiences for the What a Cartoon! (1995) pilots.
When Beatrice answers the phone, the Mayor asks if it's Bubbles. This means that despite the Professor not creating them, the Powerpuff Girls must still exist in this dream.
As of this episode, all three Powerpuff Girls have talked like Mojo does (Blossom: The Powerpuff Girls' Best Rainy Day Adventure Ever/Just Desserts (1999). Bubbles: Slave the Day/Los Dos Mojos (1999))