Now that you mention is Yoko was the first one to appear in the opening wasn't she? Thank you MongoMcMichael, for letting me know I wasn't the only one who played that game!
There was also a live action film made between seasons of this TV series where the lead schoolgirl detective manages to defeat an attack helicopter with her yoyo.
In the criminal justice system, the people are represented by two separate yet equally important groups: the Yo=Yo Girl Cops, who investigate crime, and the Marble Throwing Girl Cops, who prosecute the offenders. These are their stories.