Like many people, I wish I had known that you can get Pikachu as your starter in Pokémon Go. When you first start the game you will see Bulbasaur, Charmander and Squirtle near your Trainer. Most player's first instinct is to choose their favorite one immediately (Mine was).
However, if you want Pikachu as your starter follow these simple steps:
#1. Instead of tapping on one of these three, walk away from them.
#2. Keep walking away from them and you will see that they disappear and then reappear near your Trainer. Do this four times.
#3. Once you have done this four times, continue walking and the fifth time Pikachu will pop up on your map along with the other three starter Pokémon.
#4. Tap on Pikachu to start the encounter and throw a Pokéball at the Pikachu to capture it.
#5. Congratulations you now have started Pokémon Go with a brand new Pikachu!
If you know anyone who may just be installing the game, share this with them before they choose their starter!