I actaully have found a very effective genesect counter to most sets that isn't trapped by dugtrio in specially defensive conkeldur. With 252 special defense and hp evs, adamant, scarf genesect can't 2 hko with any move, except for a boosted thunder, or a sun boosted boosted flamethrower, only the latter of which is a surefire 2hko. It also easily defeats the rock polish set by avoiding a 2 hko after healing with drain punch from life orb boosted special hits. Conkeldurr can also hits hard, unlike most genesect counters, even with the lack of offensive investment. The set I have been using is the standard bulk up set with modified evs. Conkeldurr is only one example among many of the many ways to handle genesect on balanced and offensive teams. Stall honestly should have no issue with genesect anyway, since chansey easily walls it as genesect is worn down by the hazards stall sets up anyway. Really, genesect IS manageable, and should not be banned, because the mecha bug does not easily defeat any playstyle, and there are numerous ways to defeat genesect, be it through hazards, hail, weakening critical attacks with weather, or just using dd salamence over dragonite to outspeed and ohko it.