Originally Posted by Fat Dark Fallen Angel
Not to mention that the RP Sheer Force Landorus is always there, and will be a good replacement for the RP Genesect. It doesn't have the same good coverage, but it has sheer power (pun intended) and doesn't suffer from Life Orb recoil.
As for the Expert Belt set, unfortunately I can't think of any good Pokémon with as much power as Genesect (or close to this) and the same coverage. Some Dragons can replace it on that extent - what they lack on super-effective coverage, they have on neutral coverage thanks to Dragon only missing out Steel-types. There's also this other Jirachi set on Smogon:
Jirachi @ Expert Belt
152 Atk / 204 SpA / 152 Spe
~ Iron Head / Psychic
~ Fire Punch
~ Hidden Power Ice / Energy Ball
~ Thunderbolt / Energy Ball
It lacks the same speed and power as Genesect, though... the only real advantage that it has over EB Genesect is Iron Head, which lets it hax the opponent to death. This set also lacks speed to outspeed some things like Haxorus and Hydreigon.
added you sets and I'll add rp landerous if someone can post the set for it. Ye and I agree jirachi is the only thing to come close, but it dosn't do such a bad job when most things it will be hitting have a quad weakness or flinching to death.