Pokémon TCG · Undone Seal · Japanese · #26

Rain Castform #26 (Japanese) price

Name: Rain Castform #26 (Japanese, Undone Seal)
Brand: Pokémon
SKU: JP-UNDONE-SEAL-26
Price: 5 USD

Undone Seal26

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Market prices

$5.00TCGplayer market price · Near Mint

–Cardmarket · Near Mint

–7-day change

#44 of 78Value rank in the set

Price history chartSee it in Sparkl Undone Seal master set · 83 cardsOpen in Sparkl Graded prices · PSA, CGC, BGSIn Sparkl Pro

Rain Castform (#26, Rare) is a card from the Japanese Pokémon set Undone Seal. Near Mint (1st Edition), it has a market price of about $5.00 on TCGplayer (updated November 5, 2026). Among the 17 Rare cards of Undone Seal, it is the 11th most valuable.

Rain Castform #26 prices by finish

Finish	TCGplayer	Cardmarket
1st Edition	$5.00	–
Unlimited Holo	from $6.00	–

Near Mint prices: TCGplayer market price, lowest TCGplayer listing, updated November 5, 2026. “From” marks a lowest listing: an asking price, not a market value.

Price charts, graded prices from PSA, CGC, BGS, SGC, TAG and ACE, PSA population counts and recent sold listings are in Sparkl Pro.

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About this card

Set: Undone Seal (Japanese)
Number: 26
Rarity: Rare
Finishes: 1st Edition, Unlimited Holo
Rank in its rarity: 11th of 17 Rare cards
Against its rarity’s median: 0.8× the median ($5.92)
Released: January 16, 2004
Print language: Japanese

How this page is made: Near Mint prices from TCGplayer and Cardmarket, refreshed daily; ranks, medians and comparisons are computed by Sparkl from those prices.

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The 10 most valuable · Undone Seal prices

Next to Rain Castform #26 in Undone Seal

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