The expansion Surging Sparks saw the last trickle of cards with these mechanics before they were swiftly pushed aside for Trainer's Pokemon
Leaving aside the economic part of it, I think having things like Secret Lair and all these alternate art cards is a great way to showcase less conventional art while keeping the main sets visual language coherent
Greninja GX gets a very computer-generated illustration here by 5ban Graphics
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I hope you've gained enough confidence to try it out
I don't know, buy Observed, Dj Vu (I know it does almost nothing in this deck, but hey, you won't need any more experience, really), second copy of Scrapper