This is where the Cube-like part of the format kicks in, as all a Battle Box needs to be is at least 200 or so cards, although you can get up to, well, as many cards as you want, really
The correct setup can overwhelm even the toughest of opponents, making it a solid choice for both competitive and casual players
He plays nicely into that space
Like most Pokmon cards, the value of Absol 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 (Secret Wonders)
In all honesty, I personally believe they belong in our list of the best Pokmon cards ever, purely for looks (and they look even better in person, believe me)