I think Holon Circle is a good card for stalling whilst you're hurting your opponent in seperate ways, like Crobat ex, Cacturne-d, Shiftry ex, Snorlax-d, Walrein ex, Exploud ex, etc. Simply put counters on your opponent, power up your bench, Windstorm it away and start the sweep. Of course Houndoom would be absolutely essential otherwise your opponent could counter-stadium/windstorm and ruin it all. You'd probably need 4 Holon Circle in a decent stalling deck and cards which can get it into your hand from your deck and discard pile too, then just keep replaying it, repeat stall tactics and hurt them without attacking. I think it would work better in 2vs2 since there's more combos available, but it's still viable in single.
Btw, do we REALLY need comments on the artwork? That really has no influence on the card's review and takes up space if you ask me.