>>27617926I finished mine in Gen4 since every Pokemon was attainable in HGSS, including event Pokemon. It was pretty simple after that to keep it up, though starting from scratch is pretty daunting.
Just catch literally everything. Make your team whatever, but catch every single available pokemon as you encounter them till you have everything available and then move on. Evolve whatever you need post game. Move on to next game, rinse/repeat.
