Hint: The Reset Surveillance Room and the Silver Shovel

Head to the city after 8 p.m. and you may just come across a surprise. Head to the right to where the cones are and one may be moved aside at random. Enter the tunnel and you'll come across Resetti himself in his den of wonders. He'll yell at you as usual and give you a Silver Shovel (which will occasionally double your money when you use it on Money Stones).