The Pokemon TCG has had its ups and downs since the late 1990s, but its renaissance in the 2020s has been stronger than ever, thanks to a renewed interest in both valuable modern and vintage cards.

"Gotta catch 'em all!" That's the motto for avid Pokémon card collectors, at least. The world of Pokémon cards has evolved far beyond the playgrounds where it first began. What was once a playful ...