Now then, Pokemaster doesn't want pre-evo Pokemon movesets. However, movesets of Slaking are mainly focused at overcoming Truant. Vigoroth, however, doesn't have that ability. Pokemaster, if this is not okay with you, can you hide it please? My Vigoroth knows:
Brick Break: Decent power, high accuracy, breaks through Light Screen and Reflect.
Crush Claw: Decent power, decent accuracy, STAB, 50% chance to lower defense.
Gunk Shot: High power, good chance to poison, this move will come as a surprise to most foes.
Bulk Up: Increases attack and defense, since Vigoroth is not fully evolved, most people will think it will just try to stall or attack, not both. This will surprise them.