Game key will be available here on SG from a old HB bundle(Nordic Games 2).

If you like Pokemon maybe you want to try my app for Android devices :D
https://play.google.com/store/apps/details?id=tuxerito.widgetpokemon
The app allows you to add Pokemons to your home screen(Watch the video to see how it works)
https://www.youtube.com/watch?v=O7LlmEOtXEs

Good Luck :)