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?

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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.

Blastoise · Expedition Base Set 4/165

Blastoise (Expedition Base Set 4/165), Holo Rare, Stage2, 100 HP. Market price €184.00, up 23.8% this week. Illustrated by Kimiya Masago. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Card text

Poke-POWER: Jet Stream — Once during your turn (before your attack), if Blastoise is your Active Pokémon, you may flip a coin. If heads, discard an Energy card attached to Blastoise, if any. Then, if there are any Energy cards attached to the Defending Pokémon, choose 1 of them and discard it. This power can't be used if Blastoise is affected by a Special Condition.
Energy Cannon 40+ — Does 40 damage plus 10 more damage for each Energy attached to Blastoise but not used to pay for this attack's Energy Cost. You can't add more than 20 damage in this way.

Weekly price history

Week	Market price
2026-W31	€152.80
2026-W32	€152.80
2026-W33	€152.80
2026-W34	€152.80
2026-W35	€152.80
2026-W36	€161.09
2026-W37	€166.10
2026-W38	€148.60
2026-W39	€184.00

Printings & variants

Holo — $400.00
Reverse Holo — $499.95

Questions

How much is Blastoise 4/165 worth?

Blastoise from Expedition Base Set (4/165) has a market estimate of €184.00, up 23.8% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Blastoise 4/165 rare?

It is a Holo Rare from Expedition Base Set, a 165-card set.

Is Blastoise 4/165 tournament legal?

Blastoise 4/165 has rotated out of the current formats.

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