User blog comment:Kogath/Monster Hunter Online Discussion/@comment-28847569-20190319124417/@comment-28847569-20190319133108

Kut-Rex was 2016, but yeah, you're probably right that this is for April Fools, since test server additions usually get added to the main server a week or two later.

Kind of funny how much effort was put into what is essentially a joke though, while Teostra and Lunastra still use Kushala's theme and sound effects. Online giveth and Online taketh away, I guess.