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.

Aron · Undaunted 42/90

Aron (Undaunted 42/90), Common, Basic, 50 HP. Market price €0.12, down 7.7% this week. Illustrated by match. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

When it evolves, it sheds the steel carapace that covered its whole body and develops a new one.

Card text

Metal Sound — Flip a coin. If heads, the Defending Pokémon is now Confused.
Headbutt 20

Weekly price history

Week	Market price
2026-W31	€0.15
2026-W32	€0.13
2026-W33	€0.13
2026-W34	€0.13
2026-W35	€0.14
2026-W36	€0.13
2026-W37	€0.13
2026-W38	€0.13
2026-W39	€0.12

Printings & variants

Normal — $0.32
Reverse Holo — $1.82

Questions

How much is Aron 42/90 worth?

Aron from Undaunted (42/90) has a market estimate of €0.12, down 7.7% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Aron 42/90 rare?

It is a Common from Undaunted, a 90-card set.

Is Aron 42/90 tournament legal?

Aron 42/90 has rotated out of the current formats.

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