You can search pokemons by distance in pokemon go.
this is the easiest search term you can copy and paste.
search pokemon by distance :
examples and more info:
pokemon that caught at a distance further then 100 kilometers:
the best use is to search for pokemons that are more then 100 kilometer away,
that way you will get 1 xl candy of the traded pokemon ! and more candies
more distance search options in pokemon go :
distance 100-200 : type this to find all pokemons caught between 100-200 km
from your current location. you can replace the 100 and 200 with any other
distance 100 : only pokemons that caught less 100 km from your location.
distance 200- : pokemons caught further then 200 km away from your location.
note : all those searches will change as you change your loctaion!