You are searching for this Mobile game Pokemon Go, it means still Niantic and The Pokemon Company to announce an official release date of Pokemon Go in India. But it can be played on your Android mobile by downloading Pokemon go APK which is available online. Please follow these below steps to download, install and play Pokemon go.
Steps to download Pokemon Go App on Android in India
1 On your phone tap on Settings.
2 Tap on Security or Privacy.
3 Go to Unknown sources. And tap Allow for the installation of apps from unknown sources. This will allow you to install Pokemon Go.
4 On your phone, download Pokemon Go APK from this link.
5 Now simply go to the Downloads folder on your phone, locate the APK and install the game by following the instructions there.
You can now play and enjoy the Pokemon Go on you Android Mobile devices. If you have any queries please ask through comments.