Don't throw away your Pidgeys in 'Pokémon GO' -- here's why you should hold onto them

If you're playing "Pokémon GO" you've probably noticed you come across a lot of Pidgeys, Rattata, Weedles, and Caterpie in your quest to become a Pokémon Master.  You're also probably tempted to casually toss away some of these common Pokémon to Professor Willow for some sweet, sweet Poké candy. We know. It's tempting. Plus, a Pigeotto is way cooler than a Pidgey.  The Pokemon Company BUT you may want to think twice before transferring away those recurring Rattata and Pidgeys. If you're...