Teen Titans/Barney

YOU PUT ACID IN THE DRINKS!! Nice one!

Cast

 * Cyborg as himself
 * Barney, BJ, Baby Bop, and Riff as themselves
 * Robin as Austin Seraphin
 * Raven as Konnichiku/Nagoya/Lord Gyromatic
 * Beast Boy as St. Kressja
 * Starfire as Reimu (from Touhou)
 * Aqualad as J-Rock
 * Deathstroke as The Winkster
 * Gizmo as Ashley (footnote: that's one of ASCII's younger sisters.)