Pokémon Go has new mechanics that add depth to the gameplay. With Mega Evolution, select Pokémon (like Charizard and Gengar) can become more powerful versions of themselves for a limited time.
Capturing Pokémon with AR is part of the fun, especially when pocket monsters pop up in inappropriate places, but it's easy to catch Pokémon without worrying about aiming your phone camera.
The best way to grind XP is to catch several low-level Pokemon, pay attention to the number of candies needed to evolve them, and wait until there are enough candies for multiple evolutions at the same time.
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