I want places where I don't have to run half of the appearing pokémon.
best EV training spots/Pokémon
HP: Caterpie - route 1 - 1 EV Attack: Yungoos/pikipek - route 1 - 1 EV Defense: Roggenrola - Ten Carat Hill (cave) - 1 EV Special Attack: Psyduck - Brooklet Hill - 1 EV Special Defense: Tentacool - melemele sea - 1 EV Speed: Spearow, Cutiefly - route 3 - 1 EV
Note: if your Pokémon has Pokerus and is holding a power item, you need to defeat 7 SOS called Pokémon to max out that certain EV stat
Source: https://m.youtube.com/watch?list=LLe_7_zEmNK8m-tD55eUGbiQ&v=v9oBTNzY980