Fans of the show will know that certain characters can be evolved either once or twice. Charmander, for example, can evolve into Charmeleon and then into Charizard and with each evolution, their moves and special moves evolve too.
To evolve your characters in Pokémon Go, you’ll need to collect Candies and Stardust. Every capture you make increases your Stardust, but you need to catch the same character multiple times to get character-specific Candies. For example, each time you catch Charmander you’ll get three Charmander candies and you need 50 to evolve into Charmeleon.
You can’t use candies from one character to evolve another. You can also get more Candies by transferring individual Pokémon back to Professor Willow, but this only produces one candy per transfer.
Below each Pokémon on their respective information page is a Stardust gauge, the number of Candies you have as well as their special moves. In addition to using Stardust to evolve your Pokémon, it can also be used to boost a character’s combat points (CP).
Keep in mind that rarer Pokémon – particularly starters – will be much harder to evolve purely on the basis of scarcity.