The current value of Rain Castform (Undone Seal #026) is €4.75, updated August 18, 2026, based on the latest market floor tracked by RareBit.

ADV4 · #026 · RARE

Rain Castform

Undone Seal · Rare

JPNM

Current value · NM · JP

€4.75+24.6%

Cardmarket JP · 62 observations

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7d avg

—

30d avg

€4.14

90d high

€4.75

90d low

€3.49

About this card

Rain Castform is a Pokémon card from the Undone Seal set (ADV4 #026). Its rarity is Rare.

Price history

7D30DAll

CM JP avg· €4.35TCGplayer US

Pro analysisRead the full analysis

eBay Graded

eBay GradedAll PSA listings on eBay

• 10
  $190.75
• 9
  $60.02

Attributes

SetUndone Seal

Number#026

RarityRare

Languages

SourcesCARDMARKET · PRICECHARTING · TCGPLAYER

Population & conditions

NEAR MINT · 5

Other Rain Castform cards

• 
  PCG6 · #026

  €10.99
• 
  HL · #23

  $5.50
• 
  DS · #26

  $4.22
• 
  DP5C · #Castform-Rainy-Form

  $2.84
• 
  LA · #49

  $2.68
• 
  CRE · #33

  $0.40
• 
  S6K · #013

  $0.24-4.0%
• 
  S8B · #032

  $0.200.0%
• 
  CN-CS3.5C · #19

  €0.020.0%

Prices updated Jul 30, 2026