what is guaranteed in a japanese booster box Pokemon Vstar Universe (S12a) Are SR's no longer guaranteed

So, whats the catch

It boasts the largest card selection to date with over 7500 cards (counting DLC) making it a dream for card collectors and deck builders

I can also see this being used to great effect alongside any commander that makes a lot of tokens

he yells at him not to do any unnecessary risks (in the dub, Claude specifically orders Sylvio to return with the cards), but he gets cut off by the President, who convinces him to let Sylvio proceed and use the cards

Ulamog is basically a lock to trade with multiple cards, Wurmcoil leaves behind tokens if you kill it, Ulamog exiles two permanents on cast and Karn likely will trade for at least two cards