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This is likely a reference to the fact that Kyoji Yagumo Xyz Summoned her using the manga-only card Rank-Up Spider Web, whose effect allows the controller to detach an Xyz Material from an Xyz Monster they control, and then use that monster as the Xyz Material to Xyz Summon an Xyz Monster that is one Rank higher

When a nontoken creature enters the battlefield while Isle of Vesuva is out, its controller makes a token copy of it

In a deck built around lifegain, those counters start piling up fast

You can only use this effect of "Superheavy Samurai Stealthy" once per turn

Cards are added to the game using the code cards that come as an extra in physical Pokmon card packs, but they can also be bought in their hundreds for cents from various websites and stores (I throw them in the recycling in stacks), but thats the end of any expenses