By the way, that stack weighed 878 grams, if you were interested
See rule 701.34, Proliferate. 701.34a: To proliferate means to choose any number of permanents and/or players that have a counter, then give each one additional counter of each kind that permanent or player already has
Crucially, as a face-down permanent leaves the battlefield and also as the game ends or as its owner leaves a multiplayer game, it must be revealed to all players
I, personally, am not into Pokmon merch but I did almost purchase these make up sponges at the Pokmon Center Shibuya.
black for token engines, discard, and removal
Of note, there are cards that have two Booster Fun treatments for the same card