Pokémon X and Y Playthrough Discussion

Literally 3 mins into my hunting in the Friend Safari for a male Espurr in a dusk ball with Sp. Att and Speed IVs and with Own Tempo and a Modest nature, I find a shiny Duosion.
It has a modest nature, and unfortionately, Regenerator.

regenerator is a good ability still, not the BEST, but still very good.

and yeah, the chance has definitely gone down, the shiny value checker seems to pretty much confirm it