Pokémon GO Rare Candy is a special type of Pokémon Candy that can be fed to any Pokémon species. Rare Candy substitutes any other Pokémon Candy, for example, feeding Rare Candy to Pikachu will make the game treat it as Pikachu Candy.
Rare Candy is one of the few possible Raid Rewards (drops). Rare Candy was introduced to help Trainers power-up and evolve Pokémon they see very rarely, such as Porygon, Lapras etc.
Rare Candy Usage
As Rare Candy can change into any other type of Candy, it’s expected that Trainers will stock up on RC in order to perform two things:
Power-up a strong Pokémon that requires too much walking for 1 Candy
Evolve a Pokémon they’ve seen/hatched only once (example: Porygon)
The best strategy for using Rare Candy will ultimately be your decision to make, as it’s nothing different than any other Candy type. If you are used to powering up Pokémon with good IVs and strong movesets, you should probably continue doing that with RC.
Rare Candy FAQ
How many Rare Candies drop in a raid battle?
Niantic has confirmed that all Raid Drops, including Rare Candy, will be determined by several factors that include your battle performance, gym affiliation, raid boss, etc… It’s expected that 1-3 RC will drop per raid, but this needs to be tested once the Raid system goes live.
Is there any Pokémon that can’t use Rare Candies?
No, you can use RC on all currently available Pokémon species, including Regional Pokémon, Ditto and ultra-rare hatches.