InvestiGators: Braver and Boulder #5

Mango and Brash's latest case has our sewer-loving secret agents feeling a little stonewalled. How can they keep a low profile when their new headquarters is a giant robot towering over the city?! Can you call yourself a "Secret Agent" if everyone recognizes you? If that wasn't enough, Mango and Brash hear mysterious rumblings about BOULDER BUDDIES. Are they just the latest fad or are they part of a mob-run scheme? Could a rocky relationship from the Investigator's past be hiding beneath the surface? This has to be the most stone-cold mission yet!