In "Birthday Bash" when Bubbles trips Mojo's robot,there is a two frames animation gag of the word "trip" in white against a black screen.
This is the first episode to be directed by Randy Myers, a member of the Craig McCracken's unit team.
Only The Powerpuff Girls (1998) program that Craig McCracken is not credited as being their creator.
This episode is the codename for the 1998 Steve.