Use APKPure App
Get Battle Guide Pro: Pokemon Go old version APK for Android
Get a list of pokemons to defeat all gyms
In pokemon go sometimes is hard to defeat a gym, with this application you'll get the details on how to defeat the hardest enemies.
Just select a pokemon and you'll get the dps/speed for all attacks and a list of pokemon that can defeat him
Individual Values (iV) Calculator added
More features ongoing :)