porygon pokemon cards (HGSS22) [HeartGold & SoulSilver: Black Star Promos] If heads Pokemon X & Y Ancient

Creatures that come prepackaged with interactive "enters the battlefield" abilities are common implementations of self-contained two-for-ones

[10] Unsigned copies of this card have sold at most for $100,000 in the past, so this might be one of the only situations where a signature directly on the card improved its overall value

Even if it's technically a rare card, it's not clear how hard itll be to come by

In second place we have my second-favourite eeveelution in Sylveon ex, at 253

Though it's ultimately up to preference, this Pokemon's easily distinguishable shiny colors make this card pop more than Jolteon's, especially as Vaporeon contrasts with the blue background