Darkyubi is an enhanced Kyubi with a darker coloration. He is a silver fox with very long, dark purple claws. He has pale violet eyes and light blue facial markings. His inner-ear is dark indigo and grape. His wrist, lower body, tips of tail, fur around the neck, and ear-tips are dark grey. Attached to the fur of his neck are four thin, long curled strands of milk-blue. He is seen holding a bright violet and indigo flame, versus the red flames that normal Kyubi weilds.
Yo-kai Watch 2
Darkyubi can only be befriended in Psychic Specters, and can be befriended with these steps:
Complete multiple quests involving Whispocrates, Directator, and Dame Dedtime
Head to the Sawayma Castle at night time, and head to the right side to find Darkyubi
You may challenge him daily until you befriend him.
Yo-kai Watch: Wibble Wobble
Darkyubi could be freed from the Crank-a-kai as an event Yo-kai during a special period.
Yo-kai Watch Busters
Darkyubi can be freed from the Oni Crank-a-kai.
Darkyubi, as Darkyubi Jun, can be freed from the Crank-a-kai with a Sawtoakushi (Wei) Coin
Yo-kai Watch 3
Darkyubi is exclusive to Sushi version and can be befriended with these steps:
Clear Chapter 10, and have the helicopter with an S rank Watch, as well as clear the sidequests involving Kyubi and Awevil, the player must also have the diamond drill, and the melamella drill.
Head to the Mt. Wildwood Cave and cross the cliff with the helicopter
You must battle him inside the cave and if you win it will be an auto befriend.