It attracts prey with a sweet scent, and downs it with thorny whips hidden in its arms. With the movements of a dancer, it strikes with the whips densely lined in thorns. The more toxic its poison is, the sweeter the aroma it uses for hunting prey. Each of its hands contain different toxins, but both jab with near-fatal power.
In third generation, Roselia was first introduced. It was okay to use, but had some bad base stats. It wasn't all that fast, and was easily bruised by physical attacks, especially Super-effective ones. Then the Diamond & Pearl games were released. Roselia got a good evolution- Roserade. Fourth generation was Roserade at its best. It doesn't have the best HP stats with only a base of 60. Its Physical attack stat is okay, with a base of 70, and it still doesn't do well with physical attacks only having a base Defense stat of 55. It has a base Speed of 90, which isn't bad. Its specially based stats are what make it good. It has a base Sp. Defense stat of 105 and an amazing Sp. Attack stat of 125. This pretty much means it's great to give Roserade specially based movesets. It gets 4 weaknesses, which is better than a pure Grass-Type and other Grass-Types when it comes to weaknesses. Its overall base stat total is 505, which is okay enough I guess...
Roserade's movepool is relatively limited, as it only gets coverage for about eight of the seventeen types, at least, when it comes to damaging attacks. Roserade gets two of the three entry hazard moves. These are moves that hurt the opponent's Pokemon when they're sent out to battle. The first is Spikes, but Flying-Type and Levitating Pokemon avoid it. You can set up Toxic Spikes, which poisons the opponent's Pokemon upon them being sent out to the field. Set up two sets of Toxic Spikes, and the poison will be more damaging. Steel-Types are immune to all that, but those aside, Toxic Spikes and Spikes work well together, and these are the kinds of things that are great on Pokemon like Roserade. Roserade also learns Sleep Powder, which makes your opponent fall asleep when it hits. For recovery, it has Synthesis, Leech Seed, Giga Drain- (which technically counts as a recovery move as it restores HP), & Ingrain. Roserade can use Aromatherapy, which makes it a good supporter, as it heals all the status problems of your party's Pokemon when used. Roserade should be specially based, since its Sp. Attack stat is way higher than its physical Attack. There's moves like Leaf Storm, Weather Ball, Giga Drain, Extrasensory, Sludge Bomb, Hidden Power, Shadow Ball, and yes, Hyper Beam.
As far as abilities go, Roserade's aren't all that bad. The first Poison Point. Physical contact with Roserade has a chance of poisoning the opponent. Not too bad, but you can always use Toxic instead, and the other two abilities are better, but this is an ability to keep in mind. Then there's Natural Cure. Roserade's status problems are healed just by switching out. This is an amazing ability is an ability that some usable Pokemon, (besides Corsola), seem to get. This helps Roserade be a good lead Pokemon, and it also helps because of the entry hazards it has access to. It helps a lot with users of Spore, Hypnosis, and Sleep Powder. Roserade's hidden ability is Technician. Moves with a base power of 60 or lower get a boost. This is amazing ability, especially with moves like Weather Ball and Magical Leaf. Another great ability overall.
To sum Roserade up, it is an exceptionally okay Pokemon. Many other overviews agree that it isn't as good now as it was last generation, but it can still hold its own in battle. She's a toxic Pokemon with an evolution to a popular "pre-evo". With okay Speed, but not the greatest physical offensive and defensive stats, and great Sp. Attack and Sp. Defense stats, Roserade is simply one of those great Pokemon that should be carefully considered when you battle it. Also equipped with good abilities, and fewer weaknesses than most other grass types, Roserade isn't the thing to be messed around with.