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.

Mewtwo · Expedition Base Set 20/165

Mewtwo (Expedition Base Set 20/165), Holo Rare, Basic, 70 HP. Market price €391.65, up 0.9% this week. Illustrated by Kimiya Masago. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Card text

Hypnosis — Flip a coin. If heads, the Defending Pokémon is now Asleep.
Psychic 20+ — This attack does 20 damage plus 10 more damage for each Energy card attached to the Defending Pokémon.

Weekly price history

Week	Market price
2026-W31	€292.69
2026-W32	€285.46
2026-W33	€285.46
2026-W34	€276.84
2026-W35	€276.84
2026-W36	€267.56
2026-W37	€267.30
2026-W38	€388.15
2026-W39	€391.65

Printings & variants

Holo — $409.05
Reverse Holo — $699.97

Questions

How much is Mewtwo 20/165 worth?

Mewtwo from Expedition Base Set (20/165) has a market estimate of €391.65, up 0.9% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Mewtwo 20/165 rare?

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

Is Mewtwo 20/165 tournament legal?

Mewtwo 20/165 has rotated out of the current formats.

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