Roserade @ Roseradite
Ability: Natural Cure
Modest Nature | 252 HP/252 Sp Atk/4 Spe
- Sludge Bomb
- Leaf Storm / Giga Drain
- Spikes
- Synthesis / Sleep Powder
The set above gives Mega Roserade a chance to take on some of the tier's top threats offensively while also giving it the bulk to set up multiple layers of Spikes against specially offensive foes. The given EV spread guarantees that Roserade will survive a Fire Blast from a non-boosted Clefable, which it will in turn 2HKO with Sludge Bomb (even specially defensive variants; without Sp Def investment Clefable will be OHKO'd). Serperior does a pittance with HP Fire and is easily OHKO'd by Sludge Bomb. Leaf Storm is usually preferable over Giga Drain to earn some key OHKO's, like Assault Vest Azumarill and Diancie before Mega Evolving. However, the Sp Atk drop leaves Roserade very vulnerable, and Roserade will need the recovery if you choose to forgo Synthesis for Sleep Powder. If you choose Sleep Powder, this allows you to buy time when a predicted hard counter like Heatran or Talonflame switch in. Roserade can take on some unexpected threats with this set, being able to survive Zapdos' Heat Wave, outspeed and 2HKO it.
Though their abilities are rather redundant, Volcanion makes a great partner for Mega Roserade with its ability to take on Talonflame, Heatran, and Mega Charizard-Y, along with other Fire types in the tier. Volcanion can also brilliantly tank Ice type attacks for Roserade and take on nearly any Steel type in the tier. Something that forces a lot of switches, like Alakazam, Kyurem-B, Gengar or Weavile loves Roserade's Spikes support and they can all use the extra help in scoring some crucial OHKOs and 2HKOs. Magezone is also a good teammate because it can trap and remove Skarmory, Ferrothorn, and Scizor, three otherwise excellent answers to Mega Roserade. After Spikes, Roserade will 2HKO Excadrill with Leaf Storm even considering the Sp Atk drop (so it will generally win one-on-one), but Air Balloon Magnezone would also serve as a decent answer to this threat. Gliscor can tank phsyical hits for Mega Roserade and loves its ability to dispatch of Azumarill, Slowbro, Rotom-W and Keldeo (among others) for it. Roserade also loves a teammate like Tyranitar or Scizor that can totally wreck Mamoswine (in Scizor's case) and Weavile for it. Tyranitar can also take on Talonflame, which totally wrecks Mega Roserade.