Moveset Name: RevengeKid
Move 1: ThunderPunch
Move 2: IcePunch
Move 3: FirePunch/Quick Attack
Move 4: BrickBreak
Item:ChoiceScarf/Life Orb/ ExpertBelt
Elekid is the Perfect revenge killer in LC with this Move set he can hit an unprepared opponent hard. ChoiceScarfed is Prefered on this set so it can revenge Common Scarfed 19's such as Gligar. On Life Orb/Belt sets, you want to switch FirePunch out for quickatt to get kill pokemon switching in that threaten you with priority such as eevee and buizel.
Moveset Name: Scarf Or Sash? lead
Move 1: BrickBreak
Move 2: EarthQuake/Vaccumm wave/Agility
Move 3: IcePunch
Move 4: ThunderPunch
Item: ChoiceScarf Or Focus Sash
Ability: Inner Focus/Stead Fast
EVs:HP 38, Attack 236, Speed 236
Riolu is caplable of OHKO or 2hko most leads in LC.One Advantage Riolu has is InnerFocus on the Scarf Lead because pokemon with fake out still take a full hit from Riolu putting them in a switch of die position if the werent Ko'd.
With A Focus Sash i would Recomend Stead Fast As you can Profit from the speed boost and attempt a sweep from the start. ThunderPunch and Ice Punch allow Riolu to go right past Gliscor and Mantyke, ( the first can get OHKO on the switch in if predicted correctly). With Agility you want InnerFocus. Naughty is Only ran if you choose to use Vaccuum wave to hit Scarf Users.
Other Options, With Stead Fast or Agility you can run Oran Berry to keep Riolu Alive and Continue to attempt to sweep after the speed boost.