Fake Jack challenged the player to a Turbo Duel, when the player's team were testing their new Duel Runner program on Combat Lane. Upon being defeated, the Fake Jack crashes and is revealed to be a Duelbot. [1]
After finishing the game, the player can help Mina Simington with a personal favor. Bringing Misaki to her unlocks a sidequest that allows them to repair Fake Jack, whom Mina wants to have as a surrogate boyfriend. Afterwards, the player is free to challenge Fake Jack to Turbo Duels at any time.[2]