Tetra Master card decks used by the NPCs the player challenges always consist of 16 cards, but the same type of card can be among the 16 multiple times. There are 64 decks and 128 different people that can be played against, so some of the decks are used by several people.
| Deck | Cards |
|---|---|
| 1 |        
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| 2 |     
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| 3 |     
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| 4 |     
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| 5 Marsha ( Lindblum ) |
   
|
| 6 Wimpy Guy ( Lindblum ) |
  
|
| 7 |   
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| 8 |   
|
| 9 |  
|
| 10 |  
|
| 11 | 
|
| 12 | 
|
| 13 | 
|
| 14 | 
|
| 15 | 
|
| 16 | 
|
| 17 | 
|
| 18 | 
|
| 19 | 
|
| 20 | 
|
| 21 | 
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| 22 | 
|
| 23 | 
|
| 24 | 
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| 25 Patient Fanni |
|
| 26 Moody Lafrecia |
 
|
| 27 Bookworm, Synthesist Expert, Sky Chocobo |
|
| 28 Scholars (Daguerreo, 2nd floor & Right hall) |
|
| 29 Engineer Zebolt, Librarian |
|
| 30 Old Man & Weaponsmith (Daguerreo, 2nd floor) |
|
| 31 Black mage no.24 |
|
| 32 Genome (Entrance) |
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| 33 Black mage no.123 |
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| 34 Black mage no.234 |
|
| 35 Genome (Inn) |
|
| 36 Black mage no.189 |
|
| 37 Black mage no.44 |
 
|
| 38 Genome (Pond), Lani |
|
| 39 Black mage no.192 |
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| 40 Black mage no.56 |
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| 41 Black mage no.33 |
|
| 42 Lucious Ellie |
|
| 43 Card Freak Cil |
|
| 44 Gambler Grecchio |
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| 45 Straight Shooter Shak |
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| 46 Fat Chocobo |
  
|
| 47 Bomb Master Shannon |
|
| 48 Malboro Master Joe |
|
| 49 Worker #9 |
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| 50 Gilbert's Teacher |
|
| 51 Eidolon Master Leyra |
  
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| 52 Beast Master Gilbert |
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| 53 Magic Master Thalisa |
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| 54 Four-Armed Man |
       
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| 55 Weapon Master Hunt |
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| 56 Master Phantom |
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| 57 Defence Phantom |
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| 58 Strong Phantom |
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| 59 Rare Phantom |
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| 60 Dark Phantom |
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| 61 Attic Man Wake |
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| 62 Cardona Bishop |
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| 63 Mario of the Slums |
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| 64 Sailor Erin & Oglop Master Bon |
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