They give those higher-value duplicates a little extra protection while in storage
This happens through: Sets going out of print : When the Pokemon Company stops printing a set, sealed product and singles become scarcer over time Cards being graded : Every card sent to PSA or BGS is effectively removed from circulation, reducing available supply Cards being lost or damaged : Over decades, vintage cards are gradually destroyed through wear, water damage, and disposal Collector vaulting : When collectors buy cards to hold long-term, they remove them from the market 4
Because it really seems like that's what's going on here
Taking his place is Jhoira, Weatherlight Captain
Official rules restrict players from using recently released expansions for two weeks, giving ample time for determined players to collect the Pokmon cards they need
Budew helps slow down the pace of the game, which is crucial, as the deck needs to slowly set up its attackers and Dusknoir so that it can take down even the bulkiest Pokmon