Im not excactly sure how does on Liepard in RU but ive used it numerous times and it was succesfull.
[SET]
name: FoulSwag
move 1: Thunder Wave / Taunt
move 2: Substitute
move 3: Swagger
move 4: Foul Play
item: Leftovers / Focus Sash?
ability: Prankster
nature: Careful
evs: 252 HP / 4 Def / 252 SpD
Swagger a poke that you know you can live an attack from. Sub until opponents hits itself. Now you can use a STAB Foul Play move at +2 because it uses your opponents attack. Good luck trollin with this.