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.

Grumpig · Crystal Guardians 20/100

Grumpig (Crystal Guardians 20/100), Rare, Stage1, 80 HP. Market price €1.36, up 6.3% this week. Illustrated by Mitsuhiro Arita. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Card text

Poke-BODY: Thick Fat — Any damage done to Grumpig by attacks from Fire Pokémon and Water Pokémon is reduced by 30 (after applying Weakness and Resistance).
Circular Steps 10x — Does 10 damage times the number of Pokémon in play (both yours and your opponent's), excluding Grumpig.

Weekly price history

Week	Market price
2026-W31	€1.20
2026-W32	€1.19
2026-W33	€1.19
2026-W34	€1.21
2026-W35	€1.21
2026-W36	€1.21
2026-W37	€1.29
2026-W38	€1.28
2026-W39	€1.36

Printings & variants

Normal — $0.90

Questions

How much is Grumpig 20/100 worth?

Grumpig from Crystal Guardians (20/100) has a market estimate of €1.36, up 6.3% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Grumpig 20/100 rare?

It is a Rare from Crystal Guardians, a 100-card set.

Is Grumpig 20/100 tournament legal?

Grumpig 20/100 has rotated out of the current formats.

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