Roserade has always been one of my favorite gen 4 pokemon, and it got a cool new boost in gen 5 with its new Dream World ability. Read on to see what I mean

Roserade


HP: 60
attack: 75
defense: 55
Special attack: 125
Special defense:105
Speed: 90
abilities:
Natural Cure: Any status effect goes away upon switching out. Usually a very good ability and still should be standard on most sets.
Poison Point: If Roserade is hot by a contact move the enemy has a chance of being poisoned. Normal poison is pretty crappy, so it tends to be inferior.
Technician: Any move with a base power of base 60 or less gets a 1.5X boost. A great ability, as Roserade is the first special attacker to take advantage of this to use Hidden Power. However, since Roselia and Budew get a different dream world ability, chances are you cant use any pre-evo moves on this pokemon.
Leaf Guard: Opponent-induced burn, paralysis, poison, and sleep are blocked while Sunny Day is in effect. It gets this from a dream world budew evolving. Generally an inferior Natural Cure.
Needless to say, roserade didn’t gain too much in the generation switch, outside of technician. It also is probably the only grass type sad about giga drain’s boosted power, since without it, it would have been an amazing move, restoring health and having 90 BP + stab. Instead, it must rely on grass knot. The reason why GK is used over energy ball is because if it has 60 power, it increases back to 90, namely, against vaporeon. Troll is a nice base 90 neutral move. We also have the base 90 move type of your choice using hidden power (59). Roserade can also run spikes or toxic spikes, and with Ninetails support can use solar beam, etc.
Heres the set:
Roserade@ Life orb/choice scarf / choice specs
modest/timid
technician
252 SpA / 252 speed / 4HP (will change depending on threats)
~Grass knot
~Hidden power (fire/ice)
~ weather ball
~ synthesis / sleep powder / shadow ball / toxic / spikes / toxic spikes / sludge bomb
Otherwise, everything else is pretty much the same as gen 4.
discuss.

Roserade


HP: 60
attack: 75
defense: 55
Special attack: 125
Special defense:105
Speed: 90
abilities:
Natural Cure: Any status effect goes away upon switching out. Usually a very good ability and still should be standard on most sets.
Poison Point: If Roserade is hot by a contact move the enemy has a chance of being poisoned. Normal poison is pretty crappy, so it tends to be inferior.
Technician: Any move with a base power of base 60 or less gets a 1.5X boost. A great ability, as Roserade is the first special attacker to take advantage of this to use Hidden Power. However, since Roselia and Budew get a different dream world ability, chances are you cant use any pre-evo moves on this pokemon.
Leaf Guard: Opponent-induced burn, paralysis, poison, and sleep are blocked while Sunny Day is in effect. It gets this from a dream world budew evolving. Generally an inferior Natural Cure.
level Up moves:
budew: Lv1: Absorb, Lv4: Growth, Lv7: Water Sport, Lv10: Stun Spore, Lv13: Mega Drain, Lv16: Worry Seed
roselia: Lv1: Absorb, Lv4: Growth, Lv7: Poison Sting, Lv10: Stun Spore, Lv13: Mega Drain, Lv16: Leech Seed, Lv19: Magical Leaf, Lv22: GrassWhistle, Lv25: Giga Drain, Lv28: Toxic Spikes, Lv31: Sweet Scent, Lv34: Ingrain, Lv37: Toxic, Lv40: Petal Dance, Lv43: Aromatherapy, Lv46: Synthesis
Roserade: Weather ball, poison sting, mega drain, magical leaf, sweet scent
egg moves:
Budew :
Spikes
Synthesis
Pin Missile
Cotton Spore
Sleep Powder
Razor Leaf
Mind Reader
Leaf Storm
Extrasensory
Seed Bomb
Giga Drain
Natural Gift
GrassWhistle
note that roselia gets all the same moves as egg moves, except for extrasensory.
TM/HMs learnt: toxic, hidden power, venom shock, sunny day, hyper beam, protect, Rain dance, frustration, solar beam, return, shadow ball, double team, Sludge bomb, facade, rest, attract, rest, troll, energy ball, giga impact, flash, sword dance, psych up, poison jab, Grass knot, swagger, substitute, cut.
budew: Lv1: Absorb, Lv4: Growth, Lv7: Water Sport, Lv10: Stun Spore, Lv13: Mega Drain, Lv16: Worry Seed
roselia: Lv1: Absorb, Lv4: Growth, Lv7: Poison Sting, Lv10: Stun Spore, Lv13: Mega Drain, Lv16: Leech Seed, Lv19: Magical Leaf, Lv22: GrassWhistle, Lv25: Giga Drain, Lv28: Toxic Spikes, Lv31: Sweet Scent, Lv34: Ingrain, Lv37: Toxic, Lv40: Petal Dance, Lv43: Aromatherapy, Lv46: Synthesis
Roserade: Weather ball, poison sting, mega drain, magical leaf, sweet scent
egg moves:
Budew :
Spikes
Synthesis
Pin Missile
Cotton Spore
Sleep Powder
Razor Leaf
Mind Reader
Leaf Storm
Extrasensory
Seed Bomb
Giga Drain
Natural Gift
GrassWhistle
note that roselia gets all the same moves as egg moves, except for extrasensory.
TM/HMs learnt: toxic, hidden power, venom shock, sunny day, hyper beam, protect, Rain dance, frustration, solar beam, return, shadow ball, double team, Sludge bomb, facade, rest, attract, rest, troll, energy ball, giga impact, flash, sword dance, psych up, poison jab, Grass knot, swagger, substitute, cut.
Needless to say, roserade didn’t gain too much in the generation switch, outside of technician. It also is probably the only grass type sad about giga drain’s boosted power, since without it, it would have been an amazing move, restoring health and having 90 BP + stab. Instead, it must rely on grass knot. The reason why GK is used over energy ball is because if it has 60 power, it increases back to 90, namely, against vaporeon. Troll is a nice base 90 neutral move. We also have the base 90 move type of your choice using hidden power (59). Roserade can also run spikes or toxic spikes, and with Ninetails support can use solar beam, etc.
Heres the set:
Roserade@ Life orb/choice scarf / choice specs
modest/timid
technician
252 SpA / 252 speed / 4HP (will change depending on threats)
~Grass knot
~Hidden power (fire/ice)
~ weather ball
~ synthesis / sleep powder / shadow ball / toxic / spikes / toxic spikes / sludge bomb
Otherwise, everything else is pretty much the same as gen 4.
discuss.