Hairy Jack appears as one of the demons supporting Subzero Nodon in the "Hunter Tournament Prelims" Challenge Quest.
Hairy Jack can be encountered roaming in Shibuya. It can teach Flynn the Damascus Claw and War Cry skills through its Demon Whisper.
In the "Training Battle 6" Challenge Quest, Pyro Jack introduces the group as "Jack Brothers +" and includes Hairy Jack as the unofficial fourth Jack Brother. He acknowledges it is reaching a little, but they couldn't find any other Jacks. Flynn and his party must defeat the Jack Brothers + by using damage reflected by his demons' innate resistances while switching demons according to what is needed. During the first enemy turn, Jack the Ripper will use a physical attack targeting Flynn's party. On the second enemy turn, Jack Frost will attempt a Mabufula. For the third turn, Pyro Jack will use Maragion. On the next turn, Kanbari will need to use Tetrakarn to ward off Hairy's Jack's attack. Attacking Hairy Jack at any point may result in him using Retaliate, which will defeat one of Flynn's demons prematurely.
Shin Megami Tensei IV Apocalypse[]
"A demon dog of England. It is a type of black, demonic hound known as a Barghest and is covered with mounds of hair. It's said to appear commonly in deserted farmlands and wastelands. It can take human form. Although it has helped people in some cases, in general they are dangerous and will attack with fierce strength if provoked."
—Shin Megami Tensei IV Apocalypse compendium
Hairy Jack can be found in the Sky Tower. It can teach the Sukunda, Frenzied Chomp and Axel Claw skills through its Demon Whisper. Hairy Jack benefits from learning Physical and support skills.
Devil Survivor 2[]
"A demon dog of England. It is a type of black, demonic hound known as Barghest and is covered with mounds of hair. It's said to appear commonly in deserted farmlands and wastelands. It can take human form. Although it has helped people in some cases, in general they are dangerous and will attack with fierce strength if provoked."
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