Jim "Crocodile" Cook was a transfer student from South Academy. He used a Fossil Fusion Deck, showcasing his love of geology and archaeology. Wherever you found Jim, you would also find Shirley - his pet crocodile that he carried on his back. When Jim and his friends were trapped in another dimension, he used his Eye of Orichalcum - a mystic item that saw the good and evil inside a person - to uncover the darkness within Jaden's heart. Thought he tried to defeat the Supreme King, he ultimately failed, so he entrusted Axel to save Jaden. After returning to Earth, he went back to South Academy.
 Fossil Warrior Skull King | EARTH Rock ★8 ATK 2800 / DEF 1300 |
| Shining Sunrise [UR] | |
| 1 Rock monster + 1 Level 7 or higher monster Must first be Special Summoned with "Fossil Fusion". This card can make a second attack during each Battle Phase. If this card attacks a Defense Position monster, inflict piercing battle damage. During your opponent's turn (Quick Effect): You can target 1 monster in your opponent's GY; discard 1 card, and if you do, Special Summon that target to your field. You can only use this effect of "Fossil Warrior Skull King" once per turn. | |
 Fossil Dragon Skullgios | EARTH Rock ★8 ATK 3500 / DEF 0 |
| Jim Crocodile Cook at Lvl 14, 30 & 45 [UR] | |
| 1 Rock monster + 1 Level 7 or higher monster in your opponent's GY Must first be Special Summoned with "Fossil Fusion". Before damage calculation, if this card battles an opponent's monster: You can switch the current ATK/DEF of that opponent's monster until the end of the Damage Step. If this card attacks a Defense Position monster, inflict piercing battle damage. If this Fusion Summoned card battles an opponent's monster, any battle damage it inflicts to your opponent is doubled. | |
 Fossil Dragon Skullgar | EARTH Rock ★4 ATK 2500 / DEF 0 |
| Shining Sunrise [N] | |
| 1 Rock monster + 1 Level 4 or lower monster in your opponent's GY Must first be Special Summoned with "Fossil Fusion". If this card attacks a Defense Position monster, inflict piercing battle damage. You can banish this card from your GY; add 1 "Fossil Fusion" from your Deck to your hand. You can only use this effect of "Fossil Dragon Skullgar" once per turn. | |
 Fossil Warrior Skull Bone | EARTH Rock ★4 ATK 2000 / DEF 800 |
| Shining Sunrise [N] | |
| 1 Rock monster + 1 Level 4 or lower monster Must first be Special Summoned with "Fossil Fusion". This card can make a second attack on monsters during each Battle Phase. You can banish this card from your GY; add 1 "Time Stream" from your Deck to your hand. You can only use this effect of "Fossil Warrior Skull Bone" once per turn. | |
 Fossil Fusion | Normal Spell |
| Shining Sunrise [R] | |
| Fusion Summon 1 "Fossil" Fusion Monster from your Extra Deck, by banishing Fusion Materials listed on it from either player's GY, and if you banished monsters from both GYs, neither player can target the Summoned monster with monster effects. If a face-up "Fossil" Fusion Monster(s) you control is destroyed by battle or card effect, while this card is in your GY: You can add this card to your hand. You can only use this effect of "Fossil Fusion" once per turn. | |
| [Skill] description |
|---|
| Fusion Excavation Can be used if your Life Points are at 2000 or below. Send 1 Rock-Type monster to the Graveyard from your hand and add 1 "Polymerization" Spell Card or 1 "Fusion" Spell Card from your Graveyard to your hand. Then, you can change the added card to "Fossil Fusion." This Skill can only be used once per Duel. |
| [Skill] description | User |
|---|---|
| Fossil Warriors At the beginning of the Duel, add 1 "Weathering Soldier," 1 "Gaia Plate the Earth Giant," and 1 "Fossil Fusion" to your Deck and 1 "Fossil Warrior Skull King," 1 "Fossil Warrior Skull Knight," and 1 "Fossil Warrior Skull Bone" to your Extra Deck. Can be used if your Life Points are at 2000 or below. Send 1 Rock-Type monster in your hand to the Graveyard and add 1 "Fossil Fusion" to your hand from your Deck or Graveyard. This Skill can only be used once per Duel. | Lvl 1 |
| Draw Sense: EARTH Can be used each time your Life Points decrease by 1500. During your Draw Phase, instead of conducting your normal draw, draw a random EARTH-attribute monster. | Lvl 13 |
| Golem Hole Can be used on turn 2 and onward. Send 1 Level 8 EARTH Rock-Type monster that can be Normal Summoned or Normal Set from your hand to the Graveyard, and add 1 "Fossil Fusion" or 1 card with "Fossil Fusion" in its text from your Deck to your hand. During your opponent's next turn, you cannot Special Summon monsters from your Graveyard. This Skill can only be used once per Duel if you begin the Duel with a Deck that follows the conditions below: ●Your Deck contains at least 7 monsters and does not contain any monsters other than Rock-Type monsters. ●Your Extra Deck contains at least 5 Fusion Monsters and does not contain any monsters other than "Fossil" Fusion Monsters. | Lvl 20 |
| Geological Survey Look at up to 3 cards from the top of your Deck, then place them on the top of the Deck in the same order. This Skill can only be used once per turn and twice per Duel. | Drop |
| Earth Golem Can be used if you have at least 1 Rock-Type monster in your Graveyard. One of the following effects will be applied: ● Send 1 Rock-Type monster in your hand to the Graveyard. Then, add 1 "Gaia Plate the Earth Giant" from your Deck to your hand. ● Send 2 Rock-Type monsters from your hand to the Graveyard. Then, add 1 "Gaia Plate the Earth Giant" from outside of your Deck to your hand. This Skill can only be used once per Duel. | Drop |
| Let's Go Shirley! Can be used before your normal draw if your Life Points are at 2500 or below. One of the following effects will be applied: ● One of the cards from your normal draw this turn will be a random Reptile-Type monster from your Deck. ● Select 1 Reptile-Type monster in your Graveyard and place it on top of your Deck. This Skill can only be used once per Duel. | Drop |
| Sacred Defense Barrier Send 1 Rock-Type monster from your hand to the Graveyard. Then, add 1 "Sacred Defense Barrier" from outside of your Deck to your hand. This Skill can only be used once per Duel. | Drop |
Fossil Dragon Skullgios | EARTH Rock ★8 ATK 3500 / DEF 0 |
| Jim Crocodile Cook at Lvl 14, 30 & 45 [UR] | |
| 1 Rock monster + 1 Level 7 or higher monster in your opponent's GY Must first be Special Summoned with "Fossil Fusion". Before damage calculation, if this card battles an opponent's monster: You can switch the current ATK/DEF of that opponent's monster until the end of the Damage Step. If this card attacks a Defense Position monster, inflict piercing battle damage. If this Fusion Summoned card battles an opponent's monster, any battle damage it inflicts to your opponent is doubled. | |
 Lost Guardian | EARTH Rock ★4 ATK 100 / DEF ? |
| Paradox Brothers at Lvl 40 [SR] Jim Crocodile Cook at Lvl 7, 21 & 35 [SR] Pick-a-Gift Campaign! [SR] Card Flipper Campaign [SR] | |
| The original DEF of this card equals the number of your banished Rock-Type monsters × 700. | |
 Tackle Crusader | EARTH Rock ★4 ATK 1500 / DEF 1800 |
| Yugi Muto Lvl 45 [SR] Yugi Muto (DSOD) at Lvl 14 and 30 [SR] Jim Crocodile Cook at Lvl 11, 25 & 40 [SR] Card Flipper Campaign [SR] | |
| If this card is sent to the Graveyard: You can activate 1 of these effects.● Target 1 face-up monster your opponent controls; change that target to face-down Defense Position.● Target 1 face-up Spell/Trap Card your opponent controls; return that target to the hand. This turn, your opponent cannot activate cards with the same name as the card returned to the hand by this effect. | |
 Time Stream | Normal Spell |
| Jim Crocodile Cook at Lvl 10, 23 & 38 [SR] | |
| Target 1 "Fossil" Fusion Monster you control; Tribute it, and if you do, Special Summon 1 "Fossil" Fusion Monster from your Extra Deck, whose original Level is 2 higher than that monster's. (This is treated as a Fusion Summon with "Fossil Fusion".) During your Main Phase, except the turn this card was sent to the GY: You can banish this card and 1 "Fossil" Fusion Monster from your GY, then target 1 "Fossil" Fusion Monster in your GY; Special Summon it. | |
 Specimen Inspection | Normal Spell |
| Jim Crocodile Cook at Lvl 3, 18 & 33 [R] | |
| Reveal 1 "Fossil Fusion" in your hand; send 1 monster from your hand to the GY, and if you do, declare a Type and a Level, then your opponent looks at their hand and Deck, and sends 1 monster with the declared Type and Level from one of them to the GY (if possible). You can only activate 1 "Specimen Inspection" per turn. | |
| Level | Reward |
|---|---|
| 1 | Skill: Fossil Warriors |
| 2 | Gem x5 |
| 3 |  Specimen Inspection |
| 4 | Gems x10 |
| 5 | Deck Slot |
| 6 | Gem x15 |
| 7 |  Lost Guardian |
| 8 | Deck Slot |
| 9 | Gem x25 |
| 10 |  Time Stream |
| 11 |  Tackle Crusader |
| 12 | Gem x35 |
| 13 | Skill: Draw Sense: EARTH |
| 14 |  Fossil Dragon Skullgios |
| 15 | Gem x50 |
| 16 | SR / UR Ticket x1 |
| 17 | Gem x60 |
| 18 | Specimen Inspection |
| 19 | Gem x75 |
| 20 | Skill: Golem Hole |
| 21 | Lost Guardian |
| 22 | Gem x100 |
| 23 | Time Stream |
| 24 | Gem x120 |
| 25 | Tackle Crusader |
| 26 | Gem x140 |
| 27 | Deck Slot |
| 28 | Gem x200 |
| 29 | Gem x250 |
| 30 | Fossil Dragon Skullgios |
| 31 | Gold x100,000 |
| 32 | Gem x200 |
| 33 | Specimen Inspection |
| 34 | Gem x250 |
| 35 | Lost Guardian |
| 36 | UR Jewel x1 |
| 37 | Gem x200 |
| 38 | Time Stream |
| 39 | Gem x250 |
| 40 | Tackle Crusader |
| 41 | Deck Slot |
| 42 | gems x100 |
| 43 | gems x200 |
| 44 | gems x250 |
| 45 | Fossil Dragon Skullgios |
| Card | Rating |
|---|---|
 Fossil Machine Skull Convoy [UR] | B+ |
 Dark Alligator [UR] | B- |
 Flint Cragger [SR] | B |
 Shell Knight [SR] | B- |
 Fossil Tusker [SR] | C+ |
 Wasteland [R] | C |
 Invigoration [R] | C |
 Ancient Lizard Warrior [N] | C |
 Stone Dragon [N] | C |
 Krokodilus [N] | C |
| Card | Rating |
|---|---|
| Dark Alligator [UR] | B- |
 Granmarg the Mega Monarch [UR] | B |
| Shell Knight [SR] | B |
 Lion Alligator [SR] | B- |
| Fossil Tusker [SR] | C+ |
| Wasteland [R] | C |
| Invigoration [R] | C |
| Ancient Lizard Warrior [N] | C |
| Stone Dragon [N] | C |
| Krokodilus [N] | C |
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