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.

Raichu · Mysterious Treasures 15/123

Raichu (Mysterious Treasures 15/123), Rare Holo, Stage1, 90 HP. Market price €8.98, up 4.4% this week. Illustrated by Daisuke Ito. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

It turns aggressive if it has too much electricity in its body. It discharges power through its tail.

Card text

Electromagnetic Induction — Search your deck for up to 2 Lightning Energy cards and attach them to 1 of your Pokémon. Shuffle your deck afterward.
Explosive Thunder 30x — Discard all basic Lightning Energy cards attached to Raichu. This attack does 30 damage times the number of Lightning Energy cards you discarded.

Weekly price history

Week	Market price
2026-W31	€7.78
2026-W32	€7.78
2026-W33	€7.78
2026-W34	€7.64
2026-W35	€7.84
2026-W36	€8.72
2026-W37	€8.50
2026-W38	€8.60
2026-W39	€8.98

Printings & variants

Holo — $24.02
Reverse Holo — $26.87

Questions

How much is Raichu 15/123 worth?

Raichu from Mysterious Treasures (15/123) has a market estimate of €8.98, up 4.4% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Raichu 15/123 rare?

It is a Rare Holo from Mysterious Treasures, a 123-card set.

Is Raichu 15/123 tournament legal?

Raichu 15/123 has rotated out of the current formats.

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