The purpose of having a buddy Pokemon is to earn candy. As any avid Pokemon
GO players know, candy is a precious commodity in the game, as it is the only
way players are able to evolve their Pokemon. Each Pokemon in the game has been
assigned a distance between 1 KM to 3 KM, and walking that set distance with
that Pokemon assigned as a buddy will earn players candy. The vast majority of
Pokemon only require 1 or 2 KM to get candy, but there are some Pokemon that
require 3 KM.
rare pokemon require players to walk
farther to gain
pokemon go candy for them. Some
Pokemon GO datamining efforts have shown that even legendary Pokemon have the 3
KM distance assigned to them, like Mew, Mewtwo, Articuno, Moltres, and Zapdos.
The size of these Pokemon has also been revealed because of the datamining, and
interestingly enough, Moltres is labeled as a “Big” Pokemon, as opposed to
“Flying,” which is the label that Articuno and Zapdos fall under.
Overall, the buddy system in Pokemon GO should allow trainers to acquire
some rarer Pokemon much faster. It will also help players make more significant
progress in the game while completing other tasks like searching for Pokemon or
trying to hatch eggs. We imagine that the buddy system, like the game’s other
features, will probably be refined more over time, so expect some of the
walking distances to be adjusted in future patches and updates.