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.

Houndoom · Aquapolis 15/147

Houndoom (Aquapolis 15/147), Rare, Stage1, 70 HP. Market price €20.20, up 3.5% this week. Illustrated by Hajime Kusajima. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Card text

Fireworks 30 — Flip a coin. If tails, discard a Fire Energy card attached to Houndoom.
Dark Impact 40 — The Defending Pokémon can't use any Poké-Powers until the end of your opponent's next turn.

Weekly price history

Week	Market price
2026-W31	€17.44
2026-W32	€17.91
2026-W33	€17.91
2026-W34	€19.40
2026-W35	€19.40
2026-W36	€19.40
2026-W37	€19.49
2026-W38	€19.51
2026-W39	€20.20

Printings & variants

Normal — $78.84
Reverse Holo — $138.91

Questions

How much is Houndoom 15/147 worth?

Houndoom from Aquapolis (15/147) has a market estimate of €20.20, up 3.5% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Houndoom 15/147 rare?

It is a Rare from Aquapolis, a 147-card set.

Is Houndoom 15/147 tournament legal?

Houndoom 15/147 has rotated out of the current formats.

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