Pokémon GO/Pokémon storage

Tracking
When walking around the map, in the bottom right there's a bar that will show you nearby Pokémon. If you have the Pokémon registered in your Pokédex it'll show up in full colour, otherwise only its outline will be visible. If you click the bar, it will open to show you Pokémon that are reasonably close. These will be divided into two groups: Nearby and Sightings. Pokémon listed under Nearby are associated with a specific PokéStop. if you go near that stop, the Pokémon will spawn. Pokémon that appear under Sightings are within 200m of your current location.

Catching
When a Pokémon appears on the map, tap it to enter catching mode. You will see the Pokémon in front of you, with a CP displayed above them. This will be ??? if it's the highest you've seen before. There is an AR (Augmented Reality) mode toggle in the top right, that can be turned on or off. It's generally easier to catch Pokémon with AR mode off.

In this mode, swipe upward on the screen to throw a Poké Ball; the faster/farther you swipe, the harder the ball is thrown and the farther it goes. If you spin the ball before throwing it, you can activate a Curveball. The Pokémon will occasionally jump to dodge your throws but Poké Balls can still hit if aimed properly. If the Pokémon attacks instead, they will become invulnerable during the animation and Poké Balls will bounce off.

If the ball hits the Pokémon, then the Pokémon may try to break free before the catch is successful. Occasionally, Pokémon will run away in a smoke cloud after breaking out of a Poké Ball, which means you can no longer attempt to catch them. If the Pokémon hasn't broken out after three shakes, the catch was successful and you keep the Pokémon. Your rewards for a successful capture are ../Stardust and Candy/ for your species.

Region-exclusive Pokémon
Certain Pokémon are exclusive to a region. Tauros is exclusive to North America; Mr. Mime is exclusive to Europe; Farfetch'd is exclusive to Asia; and Kangaskhan is exclusive to Australia. They will not spawn or hatch from eggs in countries outside their region.

Ditto, Legendary and Mystic Pokémon
Ditto, Articuno, Moltres, Zapdos, Mewtwo and Mew are not currently available in the game.

Stats
Each Pokémon has a number of statistics associated with them which defines how strong they are in battle.

Power Up
Powering Up a Pokémon requires Stardust and Candy to increase a Pokémon's level stats. This needs to be done twice to increase a Pokémon's level by one. As this sometimes raises a Pokémon's HP, it can be used as an alternate method to revive a Pokémon instead of using a Revive.

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Evolve
Certain Pokémon can be evolved. If so, you will see an Evolve button with a Candy cost. Each Pokémon species that can be evolved has a different cost associated with the evolution. Once you have the required Candy, you can click the Evolve button. You will be awarded 500XP and 1 Candy for each evolution.

Using a Lucky Egg and then evolving as many Pokémon as possible while it's active is the fastest way to gain XP.

Eevee
Eevee's have 3 different Pokémon they can evolve into, which is chosen randomly. However, by changing the Eevee's name, you can control its evolution. An Eevee named Rainer will become a Vaporeon when evolved; an Eevee named Pyro will become a Flareon when evolved; and an Eevee named Sparky will become a Jolteon when evolved. This will only work if target Pokémon is not already in your Pokédex.

Transfer
You can transfer unwanted Pokémon to Professor Willow for 1 Candy. This is effectively giving away the Pokémon as it cannot be undone.