On Crow's attempt, he equips this card with "Shooting Star Bow - Ceal" in order to decrease its ATK by 1000. "Tragoedia" (who has 3000 ATK due to Crow having five cards in his hand) then attacks this card, but the Password Robot activates "Mirror Force" to destroy "Tragoedia", resulting in Crow failing to solve the puzzle.
On Jack's attempt, he equips "Axe of Despair" onto "Tragoedia", increasing its ATK by 1000. "Tragoedia" (whose ATK was 4000 due to its own effect and "Axe of "Despair") then attacks this card as Jack assumes the set card was changed, however the Password Robot then activates "Mirror Force" to destroy "Tragoedia", resulting in Jack failing to solve the puzzle.
On Bruno's attempt, he activates "Tribute to the Doomed" to destroy this card. Since this card was removed from the field, the ATK of "Stronghold the Moving Fortress" became 0 as this card, "Red Gadget", and "Yellow Gadget" were not all present on the field.
This card appears in Paradox's explanation when he tells Yugi, Jaden, and Yusei that the reason why he came to the past was so that he could prevent his own bad future from happening. Yugi, Jaden, and Yusei disagreed with going along with Paradox's plan as Paradox's actions will destroy and ruin their eras in time since they revolved around Duel Monsters.