Would be really interesting to see
Store Championship is considered a taste of competitive play for your community, but you can run the event at Regular or Competitive REL
You usually see this played with cards that care about cheating big creatures into play, or in Commander decks that go wide
There is a white scratch on the lower left side of the back side, which seems to be an initial scratch, and a cut scratch
I would recommend keeping this card on your bench until you have retreated all of your other Pokemon, therefore all your benched Pokemon have damage on them, then you can use Serperior two or three turns in a row using Leaf Storm each turn and removing the bulk of the damage from your benched Pokemon
Speaking to Express.co.uk Alo recommended your first purchase should boil down to whether you're planning on being a collector or a player