1. How does the card stand on its own? Is it good, bad, or has potential? Is it worth playing?
Well, this card can be good on its own. Its Poke-power, Darkness Send, has the potential to bring up to three cards from the top of your opponent's deck to the Lost Zone based on how many heads they can get in three coin flips. Now since anything that goes into the Lost Zone can't be recovered, Darkness Send can certainly be annoying when it comes out. It also has a nice fast attack. It can do 30, but if you discard a card from your hand, you do 60. If you can put a special {D} onto Absol, you can potentially be hitting for 70 for one (assuming that there' an Energy Gain attached to it). Thus, I would say that Absol can potentially be good on its own, and can somewhat be worth playing.
2. What popular metagame decks is it used in?
Well, there aren't any popular metagame decks using Absol G Lv.X right now; however, if Absol G were to be popular, I have the feeling it would be paired up with another fast SP Pokemon, like Garchomp C or Luxray GL. Absol could make a good combo with either of those because like Garchomp or Luxray, it can attack for high damage for low energy.
3. What combos can you use it with? How so?
Even the though the SP combo could work, I would mainly try cards that can take advantage of Absol G's Poke-power. Primarily, these cards, in my opinion, would be either Chatot G or Slowking HS. Both can pretty much control the opponent's top decks, which is the reason why they are often used, but here, they are used in a different matter. With Chatot G, I can look at the top 4 cards of the opponent's deck and rearrange them in any order when I play Chatot G onto the bench. Being SP, this means that like Absol G, it can abuse PokeTurns pretty nicely, especially when they can be used to Chatot's power going. Slowking can be good too because like Chatot G, it looks at the top cards of the opponent's deck and rearranges them in any order, in this case, the top 3. Slowking can take advantage of the fact it can use the Poke-power every turn easily without a PokeTurn. Thus, because of their Poke-powers, they can help arrange the top cards of your opponent's deck in a way that can make Darkness Send a very disruptive Poke-power, primarily arranging all of the opponent's most useful cards. Indeed, Chatot and Slowking can be great with Absol in my opinion.
4. Give it a rating, and explain why you would give it that rating.
I would give Absol G Lv.X a 3.5/5. Absol G is certainly a decent SP. It has a very annoying Poke-power that, if played right, can potentially cause huge disruption on the opponent, especially since the power involves using the Lost Zone. It's also a fast attacker, as it can potentially be doing 70 for one if there's an Energy Gain on it. Plus, its typing can make it hit through Gengars with weakness, and the psychic resistance is great against decks like Plox or Cursegar. Of course, problems arise with this card. Fighting weakness hurts, especially against Donphan or Toxicroak G Promo. It is also largely outclassed by Garchomp C or Luxray GL, which both are considered to be faster attackers than it. Still, I think Absol G can be good nevertheless.
5. How's the artwork?
I find the artwork to look pretty cool. Absol really does show some fearsome action here, especially since it is literally jumping out of the card.