Card Appearances:Explosive Urchin
- In episode 1, this card is shown in Shark's hand during his Duel against Yuma Tsukumo. In the next episode, Shark activates this card after Yuma activates "Bye Bye Damage" in response to "Jawsman" attacking "Number 39: Utopia" and explains this card will inflict 1000 damage to Yuma during his next turn, which did not come due to Yuma winning during his own turn. This card remained on the field until the Duel was over.
- In episode 3, this card appears in a flashback Astral has when he notes even though his memories have been trapped in 99 different "Numbers" and then scattered, his memories won't return until he gathers them all.
- In episode 25, this card appears in a flashback Astral has when he reminds Yuma that they both know that Kite can control the "Numbers" at will unlike other cases they have seen.
- This card also appears in a flashback Kite Tenjo has after he arrives at the Duel Square and wonders if the memories he's scanning here are Astral's memories.
- In episode 62, this card appears in a series of flashbacks Shark has when Yuma tries to remind him of their previous Duels with each other.
