Many of you have mentioned that the TUTU APP is not working properly. You have suggested that when you open the app you see plenty of games but are having trouble finding the actual modified version of the PokeMon Go game. While you will still need the TUTU app installed in order for the Modified version of the game to work you can find the direct download for the apk in the link below.
Once you have downloaded the apk you will need to head into your settings, go into your security settings and enable installs from unknown sources. Once unknown sources has been checked use your favorite file explorer app to install the APK.