A wild Pokemon only has a certain number of HP (hit points) to spend
in battles. To make a Pokemon stronger, you must level up this creature
using Stardust and Pokemon Candy. Tap the Poke Ball on the bottom of the
screen, then the Pokemon tab on the bottom left. Choose which Pokemon
you want to level up, and if you have the appropriate amount of Stardust
and Candy, tap the Power Up button.
You can only Power Up a Pokemon so much. When you reach the max
number of HP, it’s time to Evolve the Pokemon, but you’ll need lots of
candy. Use the same steps as you would to Power Up, but instead, press
the Evolve button. In addition to adding a new Pokemon to your Pokedex
(Pidgey becomes Pidgeotto, for example) and getting lots of XP, you’ll
now have a tougher battle monster to pit against rival Trainers at Gyms.
