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.

Shellos East Sea · Majestic Dawn 73/100

Shellos East Sea (Majestic Dawn 73/100), Common, Basic, 60 HP. Market price €0.15, unchanged this week. Illustrated by Midori Harada. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

It lives along bodies of water. Its body shape changed to suit its habitat.

Shellos (National Pokédex #422) first appeared in Pokémon Diamond and Pearl (2006). Its earliest English cards in our catalogue are from 2007: Secret Wonders.

More Shellos East Sea printings

Shellos East Sea · Rising Rivals — €0.39
Shellos East Sea · Secret Wonders — €0.23

Card text

Surf 10
Muddy Water 20 — Does 10 damage to 1 of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)

Weekly price history

Week	Market price
2026-W31	€0.18
2026-W32	€0.16
2026-W33	€0.16
2026-W34	€0.16
2026-W35	€0.17
2026-W36	€0.17
2026-W37	€0.15
2026-W38	€0.15
2026-W39	€0.15
2026-W40	€0.15

Printings & variants

Normal — $0.34
Reverse Holo — $2.20

Price in context

Shellos East Sea ranks #86 of the 98 priced cards in Majestic Dawn. The median Common in the set is €0.18. The 98 priced cards in Majestic Dawn are worth €761.61 together; this card is less than 0.1% of that. The set’s value is unchanged this week. Over the last 10 weeks the set’s value went from €684.72 to €761.61 (+11.2%).

Top chases in Majestic Dawn

Glaceon 98 — €186.31
Leafeon 99 — €185.56
Garchomp 97 — €69.99
Porygon-Z 100 — €69.32
Glaceon 20 — €21.61

Set value over 10 weeks · same 98 cards each week
Week	Set value
2026-W31	€684.72
2026-W32	€696.46
2026-W33	€696.95
2026-W34	€679.56
2026-W35	€680.00
2026-W36	€671.95
2026-W37	€685.61
2026-W38	€684.58
2026-W39	€761.61
2026-W40	€761.61