Hey, is that a Black Rose??? Yes, it's Vileplume d from Holon Phantoms...
What a surprise for the COTW....
Well, lets look again at its Stages of Evolution....
Oddish
Well, this one is from Holon Phantoms. It has 40HP which isn't the Average HP for Oddish. It is a Water Type. This is really unusual, but there's a good part. There are very few Pokemon with Water Resistance. Its weakness to Fire can be countered as Oddish holds a Water Type. Most Fire Types are weak to Water. Therefore, 2X the damage can be done. No resistance is normal for Oddish. Furthermore it has 2 Solid attacks. The first one allows you to deal 10 damage for 1 Energy of any type. The second requires a Water Energy, also dealing 10 damage, while removing 1 damage counter from Oddish. 1 Retreat Cost is also common as Oddish is a "light" Pokemon.
Next we move on to a Pokemon, which is known as a Grimer or a Muk, with Legs....
Gloom
70 HP is a average for a Stage 1 pokemon. Being a Psychic type is
completely Bizzare. We've seen Colourless Types having Weakness to Colourless types, and Lightning Pokemon with Lightning Weakness such as Zapdos EX. So, Having a Psychic Weakness and a Psychic Type isn't really Surprising. No Resistance is awful, while having 1 Retreat Cost is Sweet. For 1 Energy, it can do 20 damage. Really solid and low on attack Costs. For 2 Energy, at least 1 Being a Psychic, 20 damage can be done, and prevents your opponent from retreating.
Next, we go on to.... The Ultimate Black rose
Vileplume
Well, 90 HP is Really, Really bad for a Stage 2. But, the fact that Vileplume d is a pokemon that shares a Metal Type, it can reduce damage with Metal Energy attached to it. Psychic Type is also again, unusual, but not Surprising. Its Poke-Power, Poison Pollen is one of my Favourites in the previous times. Allowing the Defending Pokemon to be inflicted by Poison with just a Flip of a coin. But, that's not the good part. What's Better is that it's cumalative, which gives you a 75% chance of a heads with 4 Vileplume d in play. It ony has 1 attack which is no good cos' Amnesia can disable Poltergeist, making it weak. Poltergeist needs 1 Psychic Energy, and 1 Metal Energy, which is quite Troublesome. It allows you to Look at your opponent's hand, allowing you to see your opponent's plan on his or her turn. It has a base damage of 30, and can add 10 damage for EACH trainer card in your opponent's hand. Since many decks have over 23 Trainers, there's a very high possibility that your opponent has at least 5 Trainers. Weakness to Psychic is quite dangerous here as Espeon EX and Gengar are heavily played in the Meta-game. 1 Retreat Cost isn't really much of a burden as it can be retrieved with many trainers like Energy Recycle System and Power Tree.
Combos.
Poison Liability
You could Poison the defending Pokemon with Poison Pollen, including you get heads, and then use liability. The Defending Pokemon will have 10 HP left, and get knocked out by Poison, while the Weezing you used have 20 HP due to the usage of Energy Root.
Ariados and Vileplume
Well, basically doing 40 Damage consistantly by Poisoning the Defending Pokemon, and using Ariados's attack to do damage. Misdreavus from LM can also be used.
Mew EX(HP) and Vaporeon EX
Using Mew EX(HP) to look at your opponent's hand, you also can also ruin your opponent's hand wih Vaporeon EX. Also using Psycho Vision, you can determine the Amount of Trainers your oppponent has in hand, and decide whether to use Poltergeist or not.
Ratings
Unlimited - 2/10
As said before, Delta Pokemon are rarely used in Unlimited. But, combined with Dark Vileplume, you can counter Sui-Toise with a Great starting hand.
Modified - 7/10
Well, loads of Trainers in decks in this format, and a lot more combos, with less broken cards.
Limited - 9/10
If you get at least a 1-1-1 Vileplume line along with Holon Castform or Metal Energy, I highly Encourage playing it.
Overall - 8/10
Well, has great Poke-Power and Attack, but it's the HP that's the Problem here.
Well, that's it for this week's COTW.