>>19723462Try Lum Berry Drifblim + Swagger Gengar. You can't get faked out by most mons and it doesn't spare anyone's life.
252 Atk Life Orb Electrode Wild Charge vs. 252 HP / 0 Def Mew: 296-348 (73.2 - 86.1%) -- guaranteed 2HKO after Leftovers recovery
+2 252+ Atk Drifblim Explosion vs. 252 HP / 0 Def Mew: 430-507 (106.4 - 125.4%) -- guaranteed OHKO
You can run Adamant on Drifblim too because the Lum Berry activates Unburden.
Getting Mega Gengar safely in Vs. Getting Electivire that Speed boost really