Among all the great new features introduced in Android 4.2, is a lesser known hero: Bouncer. Bouncer is the automated malware scanning system that Google introduced back in February. Its mains function is to analyze any app or new developer account uploaded to the Google Play store for known malware, spyware, or just plain bad behavior. In Android 4.2, Google has expanded the role of Bouncer, allowing him to keep tabs on apps you just insist on side-loading.