Third-party APKs can sometimes contain bundled malware or adware. It is highly recommended to scan any downloaded .apk file using a service like VirusTotal before installing it on your device.
If you enjoy the monster-battling mechanics but want a more secure and updated experience, you might check out: Third-party APKs can sometimes contain bundled malware or
: Features similar "capture and evolve" gameplay with modern support on Google Play. Third-party APKs can sometimes contain bundled malware or