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 H11/147

Houndoom (Aquapolis H11/147), Holo Rare, Stage1, 70 HP. Market price €15.12, up 2.9% this week. Illustrated by Hajime Kusajima. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Houndoom (National Pokédex #229) first appeared in Pokémon Gold and Silver (1999). Its earliest English cards in our catalogue are from 2001: Neo Discovery, Neo Revelation.

More Houndoom printings

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

Over the last 11 weeks it has sold for between €14.70 and €20.20. That is down 13.3% from €17.44 10 weeks ago. Right now it is 25% below its tracked high.

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
2026-W40	€14.70
2026-W41	€15.12

Printings & variants

Holo — $399.99

Price by market

Across 2 markets it lists from €18.34 to €20.16.

Cardmarket — €18.34
CardTrader — €20.16

Price in context

Houndoom ranks #50 of the 186 priced cards in Aquapolis. The median Holo Rare in the set is €9.04. The 186 priced cards in Aquapolis are worth €12181.23 together; this card is 0.12% of that. The set’s value is down 1.1% this week. Over the last 11 weeks the set’s value went from €7320.69 to €12179.71 (+66.4%).

Top chases in Aquapolis

Lugia 149 — €3443.74
Umbreon 41 — €1114.54
Steelix 35 — €910.45
Arcanine 2 — €556.64
Tyranitar 40 — €496.11

Set value over 11 weeks · same 185 cards each week
Week	Set value
2026-W31	€7320.69
2026-W32	€7420.35
2026-W33	€7938.98
2026-W34	€8029.30
2026-W35	€8046.36
2026-W36	€8082.93
2026-W37	€8212.14
2026-W38	€8316.16
2026-W39	€8676.04
2026-W40	€12312.26
2026-W41	€12179.71