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Tetramon Deck Checker · Version 1.0

Tetramon Deck Checker

Paste a deck copied from the game, or a list you saved from Reddit or Discord. The checker reports documented rule problems first, then the structure notes worth reviewing, and it never scores your deck.

Paste from the in-game Workbench, or any card list you have saved.

Reads the in-game deck text and the formats players share in: 4X Pigni, 4 Pigni, Pigni x4, Pigni ×4. · 50 cards · max 4 copies of the same canonical card

Example deck for testing the checker. It is not a recommended deck.

Paste a deck to check it.

What the deck checker tests

Every check on this page is a countable fact from the current Version 1.0 card data.

Deck rules

A deck is exactly 50 cards and holds no more than 4 copies of the same canonical Tetramon. Prints, foil and Ascension versions of one card are added together before the limit is checked.

Evolution structure

Each Evolution Card has a verified previous stage. The checker reports a card whose earlier stage is missing from the list, and reports it as a structure note rather than a rule violation.

Effect coverage

Cards carry structured effects such as Draw, Search, Mill, Discard, Freeze, Shield, Destroy, Bounce and Evolution. The checker counts how many cards in the deck carry each one.

Import

The in-game deck text is read directly, and hand-written lists are accepted in the formats players actually share, including localized card names.

What this checker does not tell you

Being explicit about the limits is part of the tool, not a disclaimer.

  • It does not estimate your win rate.
  • It does not know the opponent's deck.
  • It does not know your board, hand or turn state.
  • It does not treat a missing effect category as a mistake. A deck with no Shield cards is not wrong.
  • It cannot diagnose every live game or controller problem from a deck list.
  • It does not tell you which cards to remove. It shows the problem and opens the builder.

From the game, back to the game

The deck never has to be typed twice.

  1. 01

    In game

    Copy the deck in the Workbench.

  2. 02

    Check

    Paste it here and see what needs attention.

  3. 03

    Fix

    Open the builder with the same deck already loaded.

  4. 04

    Export

    Copy the finished deck text back into the game.

Deck Builder →Read the duel rules →

Common deck checking questions

Why is my Tetramon deck invalid?

There are only two documented construction rules to break: the deck must be exactly 50 cards, and no canonical Tetramon may appear more than 4 times. The checker lists which of them your list breaks, and keeps everything else in the Review block.

Read the duel rules →

How many cards should be in my deck?

50. The checker counts every recognized entry and shows the total, so a list that is over or under the limit is reported immediately.

How many copies of the same card can I use?

Up to 4. The limit is applied to the named Tetramon, not to each print.

Do Ascension, foil and Gold versions count separately?

No. Every print of one Tetramon is added together before the 4-copy limit is checked, which is why the checker reports one line per card instead of one line per print.

Browse all cards →

Why can't I play an evolution card?

Either its earlier stage is not in the deck, or the duel state does not allow it right now. The checker can only see the deck list, so it reports whether the required stage is present and hands the rest to duel troubleshooting.

Does every deck need evolution cards?

No. Evolution is supported, not required. Decks built on non-evolving Basics are a real and playable choice, and the checker never marks an evolution-free deck as wrong.

Can this tell me whether my deck is good?

It shows rule violations and explainable structure facts. It does not predict a tournament result, and it will not invent a score for a deck.

Related

121 playable Tetramon · 12 Play Effects · 50-card decks

Troubleshooting

If your problem is not one of these, the hub routes every symptom to the page that runs its check.