So here is whats happened with Egg Tracker: Google decided to suspend it from Google Play without any prior warning, claiming it violates their impersonation clause simply because the name contained “…for Pokemon GO”.
The appeal to get it reinstated has also been rejected.
Suspension is the worst action they can give an app (which I assumed would have been reserved for apps that actually DO try to impersonate others or steal their intellectual property, etc). It means a strike on the developer account as well as no option to rectify the issue. All stats, downloads, reviews, and so on lost.
Instead they suggest recreating all the store information and uploading a brand new application for review. With a new package name and a new application name.
This means existing users can no longer receive any updates to the old application. It also means existing users cannot migrate their database to the new version of the application, if one is created.
Anyone who wants an update for the 7km egg (with the ultra reward event giving regionals and tangela/porygon) can email email@example.com and get the new APK to manually install it. If you (temporarily) enable “trust unknown sources” in the phone, it should be fine to install it directly from the email attachment.