The most valuable card illustrated by so-taro is Umbreon & Darkrai GX (SM Black Star Promos) at $236, ahead of Gengar ($50) and Rayquaza ($7).
Value counts each card once at its highest-priced printing. The homepage leaderboard additionally requires a priced rarity cohort, so its totals run slightly leaner.
By TCGplayer market price, the most valuable so-taro card is Umbreon & Darkrai GX (SM Black Star Promos) at $236, followed by Gengar (Unbroken Bonds) $50, Rayquaza (SWSH Black Star Promos) $7, Vaporeon (SWSH Black Star Promos) $6, Gyarados (Burning Shadows) $4. Prices are TCGplayer market for raw copies (any condition) and refresh daily.
TickerMint tracks 19 Pokemon cards illustrated by so-taro across 19 printings, with a combined market value of $315 counting each card once at its priciest printing.