http://www.smogon.com/dp/pokemon/roserade
Ahhh, the popular flower. I'm contributing two viable sets to the analysis in this peer edit.
[SET]
name: Toxic Spikes
move 1: Toxic Spikes
move 2: Sleep Powder
move 3: Leaf Storm / Grass Knot
move 4: Hidden Power Fire
item: Focus Sash
nature: Timid
evs: 4 HP / 252 Spe / 252 SpA
[SET COMMENTS]
<p> Roserade is an excellent choice as a lead to get Toxic Spikes down early. Good speed, a reliable sleep move, and the Focus Sash almost ensure that Roserade is able to get both layers out on the field before biting the dust. Leaf Storm is the preferred STAB, since Roserade won't be out long, but Grass Knot offers greater damage over two turns among the likes of Gyarados and other heavier opponents in both OU and Ubers. The final slot is for slapping Forry around, as you can switch in and absorb his Toxic Spikes before laying your own. Hidden Power Ice and Ground are viable alternatives to cover specific threats with a 4Xs weakness.</p>
[SET]
name: Spikes
move 1: Spikes
move 2: Grass Knot
move 3: Hidden Power Fire
move 4: Rest / Sludge Bomb
item: Leftovers
nature: Timid
evs: 252 HP / 252 Spe / 4 SpA
[SET COMMENTS]
<p> Thanks to her respectable special defense and Natural Cure, Roserade can come in several times during the course of a battle and lay down spikes. Grass Knot and Hidden Power Fire go a long way in keeping spikes on the field, as Starmie, Donphan, and Forretress won't be switching in any time soon. Rest allows Roserade to abuse Natural Cure after spiking, as Hidden Power Ice from the likes of Zapdos and Celebi will fail to 2HKO a 252 HP Roserade. Sludge Bomb can be used as secondary STAB to hit the likes of Salamence and Infernape.</p>
[EVs]
<p>The spiking set greatly benefits from 252 HP EVs by allowing Roserade to tank special hits quite well, giving her more opportunities to lay spikes. This EV spread can also be used on the Toxic Spiker.</p>
[Other Options]
<p>Synthesis can be an option on the Sunny Day set for optimal healing. Stun Spore can also be considered to help with Roserade's less-than-stellar speed and sturdiness. Grasswhistle and Aromatherapy are also options on the spiking set since Sleep Powder is illegal with Spikes.</p>
Ahhh, the popular flower. I'm contributing two viable sets to the analysis in this peer edit.
[SET]
name: Toxic Spikes
move 1: Toxic Spikes
move 2: Sleep Powder
move 3: Leaf Storm / Grass Knot
move 4: Hidden Power Fire
item: Focus Sash
nature: Timid
evs: 4 HP / 252 Spe / 252 SpA
[SET COMMENTS]
<p> Roserade is an excellent choice as a lead to get Toxic Spikes down early. Good speed, a reliable sleep move, and the Focus Sash almost ensure that Roserade is able to get both layers out on the field before biting the dust. Leaf Storm is the preferred STAB, since Roserade won't be out long, but Grass Knot offers greater damage over two turns among the likes of Gyarados and other heavier opponents in both OU and Ubers. The final slot is for slapping Forry around, as you can switch in and absorb his Toxic Spikes before laying your own. Hidden Power Ice and Ground are viable alternatives to cover specific threats with a 4Xs weakness.</p>
[SET]
name: Spikes
move 1: Spikes
move 2: Grass Knot
move 3: Hidden Power Fire
move 4: Rest / Sludge Bomb
item: Leftovers
nature: Timid
evs: 252 HP / 252 Spe / 4 SpA
[SET COMMENTS]
<p> Thanks to her respectable special defense and Natural Cure, Roserade can come in several times during the course of a battle and lay down spikes. Grass Knot and Hidden Power Fire go a long way in keeping spikes on the field, as Starmie, Donphan, and Forretress won't be switching in any time soon. Rest allows Roserade to abuse Natural Cure after spiking, as Hidden Power Ice from the likes of Zapdos and Celebi will fail to 2HKO a 252 HP Roserade. Sludge Bomb can be used as secondary STAB to hit the likes of Salamence and Infernape.</p>
[EVs]
<p>The spiking set greatly benefits from 252 HP EVs by allowing Roserade to tank special hits quite well, giving her more opportunities to lay spikes. This EV spread can also be used on the Toxic Spiker.</p>
[Other Options]
<p>Synthesis can be an option on the Sunny Day set for optimal healing. Stun Spore can also be considered to help with Roserade's less-than-stellar speed and sturdiness. Grasswhistle and Aromatherapy are also options on the spiking set since Sleep Powder is illegal with Spikes.</p>