EVs: 252 Sp. Def / 174 HP / 84 Sp. Atk
Nature: Calm (+Sp. Def -Atk)
Held Item: Leftovers / Big Root
Ability: Natural Cure
Finally, Roserade, the Special Wall! This Roserade holds a lot of Special Defense and HP along with some good Special Attack! Roserade already has good enough Speed to launch Toxic. So you could use Leech Seed to begin with, Ingrain, spread Toxic around, and then spam with Giga Drain! However, do not get predictable with Toxic and Giga Drain, as they are your only line of Offense! Use Toxic when necessary and use Giga Drain when necessary. But once every opposing Pokemon is poisoned, you must be wise when using Giga Drain. Feel free to switch in and out of battle with Roserade at will. Roserade's High Special Defense and Calm Nature will be great to take hits from Ice, Psychic, Flying, and Fire Special Attacks! Especially with it's increased HP! It's increased Special Attack will aid in using Giga Drain. The Leftovers will really help with this set as you will be recovering HP from Ingrain and Leech Seed. Plus, you will already have High HP! So your HP while holding Leftovers will mostly like stay at Green Health for quite a while in battle even while your getting hurt from the Sandstorm, your HP will regenerate greatly! So the Leftovers is Highly suggested! The Big Root is also a very potent held item for this set! As it will increase HP restored from Leech Seed, Ingrain, and
Giga Drain by 30%! This will also keep your HP really high in battle if your getting hurt by the Sandstorm because as I just said your HP will regenerate GREATLY with the Big Root OR
the Leftovers! So they're both highly recommended!
Roserade's Ability Natural Cure can be ok in battle. When you switch out, your status problem will be healed. Natural Cure can be really good if you switch out at the right time! Such as if you switch out when you're Burned, Paralyzed, Asleep, or Frozen, your status ailment will be healed! That's all for Roserade! Just watch out for Physical Fire, Ice, Psychic, or Flying Type moves such as Aerial Ace, Avalanche, Fire Punch, or Psycho Cut etc. Anyway, this is a great set! It provides great support for Roserade, it can heal HP greatly with either item! It has High HP, Special Attack, and Special Defense! This is also a great Special Wall! I hope you use Roserade good! ^-^