Originally Posted by Fat dragonuser
Throwing my support behind LO RP Genesect like lots of others. It is kind of ridiculous how much of the metagame it can set up on and how powerful it is. If it manages a +1 boost in Sp Attk it can really power through a lot of its common checks like Terrakion/Rotom-W. I would say its next best set is an Expert Belt set with U-Turn / Ice Beam / Thunderbolt / Flamethrower. While Focus Sash works most of the time, I would agree with Jimbon that it can be incredibly inconsistent and Expert Belt serves more average use.
While Choice Scarf is its most common set I find it to be an incredible waste of potential and if I do run a Choice Scarf Genesect I often find myself needing to run a secondary Scarfer (Scarf Keldeo and co are way too common). Although it does need to be noted that these Scarfers really rose in popularity due to Choice Scarf Genesect, so take that as you will.
I agree with you dragonuser. I've found quite good success with RP Genesect. Giga drain is a staple for me nowadays to stomp over the checks for Gene such as Rotom-W and Terrakion, and to offset the LO recoil. Scarf genesect for me is quite good, but the let down is its base 99 speed which can be out sped easily. I prefer scarfers such as Keldeo, Terrakion or Mence. The fact that Genesect cannot outspeed +1 base 100s, or even at least tie with them hinders its use as a scarfer. I think people claiming it being the best scarfer in the metagame is a bit of an overstatement. The ebelt set is quite good as well for bluffing choice and getting surprise kills. I always tend to net 2 KOs with ebelt gene. I would say my favourite set has to be Rock Polish, followed by ebelt then scarf.