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.

Koga's Koffing · Gym Challenge 79/132

Koga's Koffing (Gym Challenge 79/132), Common, Basic, 40 HP. Market price €43.04, unchanged this week, relatively stable over the last 10 weeks. Illustrated by Ken Sugimori. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Koffing (National Pokédex #109) first appeared in Pokémon Red and Green (1996). Its earliest English cards in our catalogue are from 1999: Base Set.

More Koga's Koffing printings

Koga's Koffing · Gym Challenge — €2.27

Card text

Smelly Gas 10 — Flip a coin. If heads, this attack does 10 damage to each Benched Pokémon (including your own). (Don't apply Weakness and Resistance for Benched Pokémon.)

Weekly price history

Week	Market price
2026-W31	€44.41
2026-W32	€44.93
2026-W33	€44.44
2026-W34	€43.04
2026-W35	€43.04
2026-W36	€43.04
2026-W37	€43.04
2026-W38	€43.04
2026-W39	€43.04
2026-W40	€43.04

Price in context

Koga's Koffing ranks #26 of the 130 priced cards in Gym Challenge. The median Common in the set is €1.57. The 130 priced cards in Gym Challenge are worth €3535.72 together; this card is 1.22% of that. The set’s value is unchanged this week. Over the last 10 weeks the set’s value went from €3367.79 to €3535.72 (+5%).

Top chases in Gym Challenge

Blaine's Charizard 2 — €531.43
Sabrina's Gengar 29 — €317.59
Rocket's Mewtwo 14 — €221.96
Erika's Venusaur 4 — €182.86
Rocket's Zapdos 15 — €165.24

Set value over 10 weeks · same 130 cards each week
Week	Set value
2026-W31	€3367.79
2026-W32	€3350.79
2026-W33	€3337.25
2026-W34	€3535.70
2026-W35	€3535.72
2026-W36	€3535.72
2026-W37	€3535.72
2026-W38	€3535.72
2026-W39	€3535.72
2026-W40	€3535.72