Pokémon Japan · Undone Seal (2004)
Updated: November 3, 2026
See eBay listings ›Got Rain Castform 026/083? Snap a photo and CardFolio's AI estimates the PSA grade yours would get and what it's worth in its real condition. Your first analysis is free when you sign up (app in Spanish).
Get a free AI grade Price drop alert (paid plan)Rain Castform 026/083 from Undone Seal (2004) is worth $5.01 raw (ungraded), based on real sales. Check the version: the Unlimited sells for $19.03. It is the #15 most valuable of the 25 Undone Seal cards we track.
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Full card list of Undone Seal ›
Regirock ex 055/083$603.06
Ninetales ex 018/083$452.28
Heracross 009/083$50.09
Kyogre ex 039/083$40.19
Milotic 025/083$40.18
Wigglytuff ex 058/083$40.07
Ninetales 017/083$30.16
Claydol 045/083$20.03
Rainbow Energy 019/019Movie Commemoration VS Pack: Sea's Manaphy$10.04
Rainbow Energy 015/015Leafeon vs Metagross Expert Deck (Leafeon)$3.36
Rainbow Energy 066 066/066Champion Road$1.51
Metang 012 019Metagross Constructed Starter Deck$1.51
Mightyena 452/742Start Deck 100 Battle Collection$1.51MMistys Staryu 155/742Start Deck 100 Battle Collection$1.51
Natu 024 078Emerald Break$1.51
Nest Ball 013/022Ceruledge ex Stellar Tera Type Starter Set$1.51
Noctowl 008/016Meganium Constructed Starter Deck$1.51
Nosepass 006/013Entry Pack DPt (Palkia)$1.51
Ns Reshiram 545/742Start Deck 100 Battle Collection$1.51Ranking: most expensive Pokémon Japan cards ›
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