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 · Detective Pikachu 12/18

Mewtwo (Detective Pikachu 12/18), Ultra Rare, Basic, 130 HP. Market price €8.86, down 28.0% this week. Illustrated by MPC Film. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

This Pokémon was created by years of horrific gene splicing and DNA engineering experiments.

Card text

Psyjack 30 — Choose 1 of your opponent’s Active Pokémon’s attacks. That Pokémon can’t use that attack during your opponent’s next turn.
Break Burn 130 — Discard 2 Psychic Energy from this Pokémon.

Weekly price history

Week	Market price
2026-W31	€12.55
2026-W32	€12.36
2026-W33	€12.36
2026-W34	€11.96
2026-W35	€11.96
2026-W36	€11.79
2026-W37	€11.82
2026-W38	€12.31
2026-W39	€8.86

Questions

How much is Mewtwo 12/18 worth?

Mewtwo from Detective Pikachu (12/18) has a market estimate of €8.86, down 28.0% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Mewtwo 12/18 rare?

It is an Ultra Rare from Detective Pikachu, a 18-card set.

Is Mewtwo 12/18 tournament legal?

Mewtwo 12/18 is legal in Expanded.

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