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.

Blastoise · Boundaries Crossed 31/149

Blastoise (Boundaries Crossed 31/149), Rare, Stage2, 140 HP. Market price €4.12, down 0.5% this week. Illustrated by Satoshi Shirai. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

The jets of water it spouts from the rocket cannons on its shell can punch through thick steel.

Card text

Ability: Deluge — As often as you like during your turn (before your attack), you may attach a Water Energy card from your hand to 1 of your Pokémon.
Hydro Pump 60 — Does 10 more damage for each Water Energy attached to this Pokémon.

Weekly price history

Week	Market price
2026-W31	€3.82
2026-W32	€3.99
2026-W33	€4.00
2026-W34	€4.02
2026-W35	€4.02
2026-W36	€3.90
2026-W37	€4.08
2026-W38	€4.14
2026-W39	€4.12

Printings & variants

Normal — $8.65

Questions

How much is Blastoise 31/149 worth?

Blastoise from Boundaries Crossed (31/149) has a market estimate of €4.12, down 0.5% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Blastoise 31/149 rare?

It is a Rare from Boundaries Crossed, a 149-card set.

Is Blastoise 31/149 tournament legal?

Blastoise 31/149 is legal in Expanded.

Browse more Pokémon cards · All Boundaries Crossed cards · Build a deck · Track your collection