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.

Dual Ball · Expedition Base Set 139/165

Dual Ball (Expedition Base Set 139/165), Uncommon. Market price €1.42, down 3.4% this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Card text

Flip 2 coins. For each heads, search your deck for a Basic Pokémon card other than a Baby Pokémon card, show it to your opponent, and put it into your hand. Shuffle your deck afterward.

Weekly price history

Week	Market price
2026-W31	€1.64
2026-W32	€1.47
2026-W33	€1.47
2026-W34	€1.68
2026-W35	€1.68
2026-W36	€1.62
2026-W37	€1.54
2026-W38	€1.47
2026-W39	€1.42

Printings & variants

Normal — $2.07
Reverse Holo — $13.98

Questions

How much is Dual Ball 139/165 worth?

Dual Ball from Expedition Base Set (139/165) has a market estimate of €1.42, down 3.4% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Dual Ball 139/165 rare?

It is an Uncommon from Expedition Base Set, a 165-card set.

Is Dual Ball 139/165 tournament legal?

Dual Ball 139/165 has rotated out of the current formats.

Browse more Pokémon cards · All Expedition Base Set cards · Build a deck · Track your collection