Thunder Mountain ◇ #191

In 2018, Lost Thunder introduced this print of Thunder Mountain ◇. Its card type is Trainer.

The rarity label is Rare Prism Star. This gives collectors a clear identity footprint for the print.

Card subtype classification is Stadium and Prism Star. The card text reads: The attacks of Lightning Pokémon (both yours and your opponent's) cost Lightning less.

Whenever any player plays an Item or Supporter card from their hand, prevent all effects of that card done to this Stadium card. This card stays in play when you play it.

Current market pricing for Thunder Mountain ◇ (Lost Thunder) sits near $1.39. Week-over-week movement is upward at 2.2%.

Against its 30-day baseline of $1.34, this card is pricing 3.7% higher. Its 90-day trading band runs between $1.22 and $1.52, producing a 22% range and moderate-volatility behavior.

This version is categorized as Rare Prism Star.

Collector-focused market read: Short-term momentum is positive (2.2% over 7 days), while the card sits 14% above its 90-day low. With a 22% 90-day spread ($1.22-$1.52), this card currently tracks as moderate-volatility.

Versus the 30-day average ($1.34), the card is trading 3.7% higher. Available graded data shows PSA 9 at $8.00, which is +476% versus raw pricing.

Lost Thunder was released in 2018. It belongs to the Sun & Moon series.

Set size is 240 cards, which categorizes Lost Thunder as large. As of 2026, the set is 8 years old and now falls into an established back-catalog period.

In the Lost Thunder checklist, Thunder Mountain ◇ occupies position #191 as a Rare Prism Star card.