What are the most valuable cards in Lost Thunder?

By ungraded price, the top cards in Lost Thunder are Mimikyu-GX 226/214 ($325), Lugia-GX 227/214 ($240), Professor Elm's Lecture 213/214 ($185).

How are sealed product prices set?

The price is TCGplayer's market price for one sealed unit, dated Oct 26, 2026. It is a single reading and is not blended with eBay listings or the StockX and Target readings, which are shown separately where we have them.

Lost Thunder Island Guardians GX Premium Collection

Collection · Released Nov 2, 2018

Lost Thunder Island Guardians GX Premium Collection price

$560

Market price, Oct 26, 2026. One sealed unit.

Lost Thunder Island Guardians GX Premium Collection currently sells for about $560 sealed. It is a collection from Lost Thunder; see that page for what every card inside is worth.