1. The Three Most Valuable Pokémon
Okay, so they're not rare or particularly powerful, but you should actively be pursuing Pidgeys, Caterpies, and Weedles. Why? Because they only cost 12 candy each to evolve. Catch as many of these as you can so you can stockpile as many evolutions as possible. Players are already calling this "Pidgey Grinding." When you're ready to evolve, you'll want to maximize it, which brings us to our next tip.