Okay, and your question was if there were any Pokemon EV's don't work for... I'd say that they work on every Pokemon, really. I don't recall a Pokemon not being affected by a stat increaser. Except, there are some Pokemon, I think, that have such high stats in one category that you can't use anything to increase that stat... I think Blissey cannot have any HP Ups used on it, but I'll have to go back to that...
I HOPE this answers your question, though I've never heard of Effort Values, really...
Owner of the formerly ranked number one Halo PC modded server in the world, FRIGID MASS CTF WAR. Joiner-friendly mods and five-minute hotfixes = loyal clientele.
Been here since February 2004. It's May 2022 as of writing this. Wish Rich would revive this place. Guess I'm only here for the nostalgia now.