Undone Seal
#66 · 2004 · 83 cards
Market Price · Near Mint · Updated August 10, 2026
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Prices updated Aug 10, 2026
Recent market data · NM
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HP
60
Type
Pokémon
Stage
Basic
Evolves from
[]
Ability
Temperamental Weather
Once during your turn (before your attack), you may search your deck for Sunny Castform, Rain Castform, or Snow-cloud Castform and switch it with Castform. (Any cards attached to Castform, damage counters, Special Conditions, and effects on it are now on the new Pokémon.) Shuffle Castform back into your deck. You can't use more than 1 Temperamental Weather Poké-Power each turn.
Attacks
Forecast
Search your deck for a Stadium card and play it. Shuffle your deck afterward.
Extra Ball
20+
If the Defending Pokémon is Pokémon-ex, this attack does 20 damage plus 20 more damage.
Weakness
Retreat Cost
Illustrated by
Sumiyoshi Kizuki
Pokédex
#351
Ungraded + PSA / CGC / BGS grades
| Condition | Market |
|---|---|
| Near MintMost common | — |
| Lightly Played | — |
| Moderately Played | — |
| Heavily Played | — |
| Damaged | — |
Live market prices · ~ estimated using standard condition discounts
Castform
Alolan Moonlight
Castform
Brilliant Stars
+27.3%14d
Castform Rainy Form
Chilling Reign
0.0%14d
Castform Snowy Form
Chilling Reign
+44.4%14d
Castform
Chilling Reign
0.0%14d
Castform Sunny Form
Chilling Reign
-9.1%14d
Castform
Cry from the Mysterious
Castform Rain Form
Cry from the Mysterious
Castform Sunny Form
Cry from the Mysterious
Castform Snow-Cloud Form
Cry from the Mysterious
