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.

Slowking · HeartGold SoulSilver 12/123

Slowking (HeartGold SoulSilver 12/123), Holo Rare, Stage1, 80 HP. Market price €8.22, up 12.0% this week. Illustrated by Sumiyoshi Kizuki. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

It has incredible intellect and intuition. Whatever the situation, it remains calm and collected.

Card text

Poke-POWER: Second Sight — Once during your turn (before your attack), you may look at the top 3 cards of that player's deck and put them back on top of that player's deck in any order. This power can't be used if Slowking is affected by a Special Condition.
Psyshock 30 — Flip a coin. If heads, the Defending Pokémon is now Paralyzed.

Weekly price history

Week	Market price
2026-W31	€5.01
2026-W32	€5.05
2026-W33	€5.05
2026-W34	€5.37
2026-W35	€5.37
2026-W36	€6.21
2026-W37	€7.31
2026-W38	€7.34
2026-W39	€8.22

Printings & variants

Holo — $41.28
Reverse Holo — $38.77

Questions

How much is Slowking 12/123 worth?

Slowking from HeartGold SoulSilver (12/123) has a market estimate of €8.22, up 12.0% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Slowking 12/123 rare?

It is a Holo Rare from HeartGold SoulSilver, a 123-card set.

Is Slowking 12/123 tournament legal?

Slowking 12/123 has rotated out of the current formats.

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