Detective Frank is a minor character who makes his appearance in Game & Wario. As his name would suggest, he is an undercover sleuth whom the player may communicate with via the Undercover Call Code. When the code is dialed, Detective Frank introduces himself in a casual environment, either on a balcony or in an alley, reporting on what is happening before him. However, he appears to be paranoid as nothing unusual is going on.
Detective Frank has a total of five different cutscenes for his Call Code. One of them involves him on a balcony, investigating the mother from the Homey Call Code hanging laundry on a balcony across from him. Despite seeing nothing conspicuous, he insists the mother is merely trying to appear that way, telling the player he must do more investigating, and to call him back later on. Another one of the detective's cutscenes takes place here, though he is watching the mother in her panda form hanging over the laundry previously hung on the balcony instead. He is simply confused and apologizes, telling the player he will call back again.
Detective Frank's three other cutscenes show him in a modest alley, reporting on whoever he sees. One of them shows him reporting on a woman speaking with an orange alien in a pink vehicle, the same one who also appears in the Alien's Sketchbook collectible. The detective reports that the vehicle has no license plate and therefore must have been stolen. In another alley cutscene, the detective reports on a student showing off her new haircut to her friends, claiming the mystery will be solved in the end. In his final available cutscene, he reports on an elderly woman with her dog, speaking with a fortune telling wrestler, the same one who appears in the Yellow Crystal Ball collectible, as the detective even references.