The value of Snorlax Pokemon cards varies significantly based on several factors including card condition, rarity, edition (1st Edition vs Unlimited), and whether the card has been professionally graded by PSA or BGS
Fun note 2: Dragon Shield calls their oversized sleeves Outer Sleeves
The monster's special effects are disabled, but that hardly matters if you're just trying to do some damage, and if you want to use Rondo in tandem with the Mikanko Kagura ritual spell card, it gives you an easy free way to summon Ohime the Manifested Mikanko while dealing 1,000 direct damage to your opponent
Its also a fairly good card
Returning a creature may set your battlefield presence back a step, but it's a great way to regain access to powerful "enters" abilities, not to mention the mana savings on the sneak spells themselves