The Karen's Umbreon #91 Japanese-only card is highly sought after ... While it isn't anywhere near as valuable as the Charizard GX from the same set, it does come in a respectable second place ...

For now, the most expensive Umbreon card is an iconic modern grail. The Umbreon GX is one of the most valuable cards from Hidden Fates' Shiny Vault and claims the crown as the most visually ...

From Slowpoke & Psyduck GX to Mewtwo & Mew GX, these are the most valuable Unified Minds cards from Sun & Moon.