As for the appearance, everything is excellent here, as always
Sneak Peek Odds of Success Assuming there's only one card that players want to get from a Wonder Pick, using Sneak Peek doubles their chances of success, with the odds of getting that card jumping from 20% to 40%
Sorry for the tangent, but this really interesting comment you shared from your contact intrigued me one mystery to me has always been if shadowless yellow cheeks Pikachus were printed prior to red cheeks (before being changed back to yellow when shadows were added)
In the main series, the story goes that Kaiba won Solomon Mouto's Blue-Eyes White Dragon card, then destroying it
It gathers pricing, recognizes different printings, and has a simple scanner to make budget deckbuilding fun and accessible