Like most Pokmon cards, the value of Scraggy depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Unified Minds)
The Black & White era is one of the most niche of the whole TCG and many fans are now craving some of the amazing cards from the era they missed out on and, considering how important N is to Black & White, this card is one of the most prized of the era
You can only use this effect of "Abyss Actor - Extras" once per turn
While the Pokmon Company has moved away from rainbow secret rares in the Scarlet & Violet era, this Zard Card was many players' first chase card when the hobby boomed during the pandemic
The best sleeves will be the appropriate size and thickness for optimal protection
See what I can come up with