Man, I know I was one of the people who hated on the old McGar concept...but with a few changes, I've come to love it as my second favorite Gengar set! This has been an invaluable member of my cleverone team.
http://www.smogon.com/dp/pokemon/gengar
[SET]
Name: SubPunch Gengar
Move 1: Focus Punch
Move 2: Substitute
Move 3: Shadow Ball
Move 4: Hypnosis
Item: Expert Belt
EVs: 64 Atk / 192 SpA / 252 Spe
Nature: Hasty
[SET COMMENT]
<p>This Gengar is specifically built to deal with threats that are supposed counters to the standard Gengar. Blissey, Snorlax, Calm Zapdos, and bulky Fighters like Machamp and Hariyama all have serious issues with this set. Note that if the Calm Zapdos is running Sleep Talk, Gengar will most likely lose to it, unless it gets fortunate with repeated Shadow Ball induced Special Defense drops.</p>
<p>182 Attack is reached to 2HKO Blissey with a high probability, and 2HKO most Snorlax with high probability. 350 Speed is a must, both to have a possibility of keeping the Substitute in tact when faced with other Gengar, and to outspeed Infernape.</p>
<p>Since Blissey, Snorlax and other Gengar counters can easily break the Substitute, Hypnosis becomes vital to Gengar's strategy. Gengar will Substitute first turn, and Hypnosis on the turn that the Substitute is supposed to be broken, both to possibly induce Sleep and to ensure that the 70% accuracy of Hypnosis will not be as big a deterrent, as it now has two chances to hit as opposed to one. Once the opponent is safely asleep and Gengar is behind its Substitute, it can begin to wreak havoc with the perfect coverage of Focus Punch + Shadow Ball.</p>
<p>Expert Belt is chosen over Leftovers for one main reason: it saves Gengar from having to transfer a significant amount of Special Attack EVs into Attack (because Blissey and Snorlax are hit Super Effective by Focus Punch), which would significantly lower Shadow Ball's damage on common neutral threats like Garchomp and Gyarados. No Leftovers is also a non-issue since Gengar rarely will be in battle long enough in order to spend 4 Substitutes, as it switches in using its immunities and almost always grants a switch to one of its standard counters.</p>
http://www.smogon.com/dp/pokemon/gengar
[SET]
Name: SubPunch Gengar
Move 1: Focus Punch
Move 2: Substitute
Move 3: Shadow Ball
Move 4: Hypnosis
Item: Expert Belt
EVs: 64 Atk / 192 SpA / 252 Spe
Nature: Hasty
[SET COMMENT]
<p>This Gengar is specifically built to deal with threats that are supposed counters to the standard Gengar. Blissey, Snorlax, Calm Zapdos, and bulky Fighters like Machamp and Hariyama all have serious issues with this set. Note that if the Calm Zapdos is running Sleep Talk, Gengar will most likely lose to it, unless it gets fortunate with repeated Shadow Ball induced Special Defense drops.</p>
<p>182 Attack is reached to 2HKO Blissey with a high probability, and 2HKO most Snorlax with high probability. 350 Speed is a must, both to have a possibility of keeping the Substitute in tact when faced with other Gengar, and to outspeed Infernape.</p>
<p>Since Blissey, Snorlax and other Gengar counters can easily break the Substitute, Hypnosis becomes vital to Gengar's strategy. Gengar will Substitute first turn, and Hypnosis on the turn that the Substitute is supposed to be broken, both to possibly induce Sleep and to ensure that the 70% accuracy of Hypnosis will not be as big a deterrent, as it now has two chances to hit as opposed to one. Once the opponent is safely asleep and Gengar is behind its Substitute, it can begin to wreak havoc with the perfect coverage of Focus Punch + Shadow Ball.</p>
<p>Expert Belt is chosen over Leftovers for one main reason: it saves Gengar from having to transfer a significant amount of Special Attack EVs into Attack (because Blissey and Snorlax are hit Super Effective by Focus Punch), which would significantly lower Shadow Ball's damage on common neutral threats like Garchomp and Gyarados. No Leftovers is also a non-issue since Gengar rarely will be in battle long enough in order to spend 4 Substitutes, as it switches in using its immunities and almost always grants a switch to one of its standard counters.</p>