Hack King

is a Rank A Drain-attribute Merican Yo-kai of the Shady tribe.

The Yo-kai Medallium bio reads; "Geekun the geek Yo-kai went down a dark path and became the king of hackers. Once he sets his sights on an electronic equipment, there's no security measures he can't break through."

Hacking evolves from Geekun when fused with TETSUYA.

Name Origin
"Hacking" is a portmanteau of hacking (or hacker) and king.