You want a good Eviolite wall? Try Chansey, Gligar (immune to being poisoned/bulky Defogger, either/or though), Togetic (as a healer), or Golbat (fantastic ability of Infiltrator for a perfectly accurate Toxic that can go through substitutes). Hell, even Tangela with its ability of Regenerator and access to Leech Seed can be better than Dusclops if you use it right.