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.

Walrein · Mysterious Treasures 39/123

Walrein (Mysterious Treasures 39/123), Rare, Stage2, 130 HP. Market price €0.41, unchanged this week. Illustrated by Midori Harada. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

It shatters ice with its big tusks. Its thick blubber repels not only the cold, but also enemy attacks.

Walrein (National Pokédex #365) first appeared in Pokémon Ruby and Sapphire (2002). Its earliest English cards in our catalogue are from 2004: Hidden Legends, Team Magma vs Team Aqua.

More Walrein printings

Card text

Poke-POWER: Freeze-up — Once during your turn, when you play Walrein from your hand to evolve 1 of your Pokémon, you may flip 2 coins. If both are heads, discard 1 of the Defending Pokémon and all cards attached to it. (This doesn't count as a Knocked Out Pokémon.)
Ice Bind 70 — If your opponent doesn't discard a card from his or her hand, the Defending Pokémon is now Paralyzed.

Weekly price history

Week	Market price
2026-W31	€0.51
2026-W32	€0.46
2026-W33	€0.45
2026-W34	€0.46
2026-W35	€0.46
2026-W36	€0.46
2026-W37	€0.44
2026-W38	€0.43
2026-W39	€0.41
2026-W40	€0.41

Printings & variants

Normal — $0.59
Reverse Holo — $1.65

Price in context

Walrein ranks #58 of the 119 priced cards in Mysterious Treasures. The median Rare in the set is €0.94. The 119 priced cards in Mysterious Treasures are worth €393.93 together; this card is 0.1% of that. The set’s value is unchanged this week. Over the last 10 weeks the set’s value went from €343.84 to €393.93 (+14.6%).

Top chases in Mysterious Treasures

Lucario 122 — €83.21
Time-Space Distortion 124 — €49.76
Magmortar 123 — €44.36
Electivire 121 — €30.45
Alakazam 2 — €24.44

Set value over 10 weeks · same 119 cards each week
Week	Set value
2026-W31	€343.84
2026-W32	€343.12
2026-W33	€343.75
2026-W34	€366.58
2026-W35	€366.63
2026-W36	€384.02
2026-W37	€386.60
2026-W38	€390.99
2026-W39	€393.93
2026-W40	€393.93