At any rate, that's decent card advantage, as well as a way to play the same cards twice
27 Description Specs Videos Reviews Find in Store Features Bundle includes: 1x pack of 120 WC Art Series Outer Sleeves, 1x pack of 200 WC Perfect Fit Inner Sleeves Double-sleeve bundle perfect for large collections, competitive decks for popular TCG tournaments decks, and various multiplayer TCG formats Both inner & outer sleeves are designed to perfectly fit Weapons Cache, Bicycle, Pokemon, Magic: The Gathering, One Piece Card Game, Disney Lorcana, Dragon Ball Super Card Game and other compatible standard-sized trading and playing cards Tournament-level construction with smooth, clean seams and virtually no burrs or harsh edges Double-sleeving maximizes protection during transportation and gaming
One of the main reasons to buy a Pokmon booster box is for the element of surprise
It still shows in older formats in Death and Taxes-style decks, where it gives them a better game against combo and control