Lets say I was battling a wild Drudiggon, and it KO'ed my Golett, then I capture it. Will the Drudiggon have 1 Attack EV?
No, wild Pokemon can not obtain EVs. Source: Experience and logical deduction from the fact that wild Pokemon do not gain experience points when they KO your Pokemon so it would not make sense if they got EVs from it.
How to change your username
How to add a user avatar
Why was my post hidden?
Flags vs Downvotes
Official PokemonDb League
Type a Pokemon name, type, move or ability to see instant results.