Can I build a deck together with friends on TCGSwap?

Yes. Every deck on TCGSwap has a Collaboration Space. You can invite up to 5 friends; they can suggest card changes, discuss ideas, and playtest proposals. You review and apply suggestions before anything changes in your deck.

How does deck collaboration work?

It works like a pull request for your deck. Collaborators open the deck editor, make their proposed changes, and submit a suggestion with a note. You get notified, open the comparison view to see exactly what they changed, and choose to apply all, cherry-pick individual cards, or decline. Nothing changes in your deck until you approve it.

Can collaborators chat and discuss the deck?

Yes. The Collaboration Space has a shared group discussion thread for the whole deck, plus a per-suggestion Q&A thread for each proposal. You can @mention teammates and link specific cards inline.

Is collaborative deck building free?

Yes, collaboration is free for all TCGSwap users during beta. You can invite up to 5 collaborators per deck.

Does TCGSwap work for MTG, Pokémon, Yu-Gi-Oh and One Piece collaboration?

Yes. The Collaboration Space supports all four games — Magic: The Gathering, Pokémon TCG, Yu-Gi-Oh and One Piece. Format validation and card prices are included for each game.

Sunny Castform · Delta Species 31/113

Sunny Castform (Delta Species 31/113), Rare, Basic, 70 HP. Market price €2.21, down 3.1% this week. Illustrated by Miki Tanaka. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Card text

Poke-POWER: Temperamental Weather — Once during your turn (before your attack), you may search your deck for Castform, Rain Castform, or Snow-cloud Castform and switch it with Sunny Castform. (Any cards attached to Sunny Castform, damage counters, Special Conditions, and effects on it are now on the new Pokémon.) Shuffle Sunny Castform back into your deck. You can't use more than 1 Temperamental Weather Poké-Power each turn.
Holon Search — Search your deck for a Holon Energy card and attach it to 1 of your Pokémon. Shuffle your deck afterward.

Weekly price history

Week	Market price
2026-W31	€2.15
2026-W32	€2.08
2026-W33	€2.06
2026-W34	€2.38
2026-W35	€2.38
2026-W36	€2.43
2026-W37	€2.31
2026-W38	€2.28
2026-W39	€2.21

Printings & variants

Normal — $5.50

Questions

How much is Sunny Castform 31/113 worth?

Sunny Castform from Delta Species (31/113) has a market estimate of €2.21, down 3.1% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Sunny Castform 31/113 rare?

It is a Rare from Delta Species, a 113-card set.

Is Sunny Castform 31/113 tournament legal?

Sunny Castform 31/113 has rotated out of the current formats.

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