The first way to Evolve Pokemon in the game is (LEVELING UP)-the most common method.
The second way to EVOLVE Pokemon in the game is (EVOLUTION STONES)-14 Pokemon need EVOLUTION STONES to Evolve
The third way to EVOLVE Pokemon in the game is (TRADING CABLES)-these are very specific item that only Evolve 4 different Pokemon
The item TRADING CABLES is located in a POKE CAPSULE that you must find. These Pokemon do not EVOLVE during Battle.