Besides the obvious that you can ride some pokemons to go faster, is there any use to take a pokemon out of his pokeball and make it follow you?
For example, if I take out a Caterpie; I can't ride it, it just follows me around. Is there some advantage of having him out of the pokeball (like in Pokemon Go, a pokemon that is following you in the same kind of way will earn some candies) or is it just following me to be cute?