Zombie Mouse
From MHWiki
"Necromancy is never a pretty sight and this mouse is no exception. Forever doomed to stalk the earth, its hunger for cheese is insatiable and its power almost limitless. All mice have a weakness, but how do you kill something that's already dead...?"
The Zombie Mouse is a breed of mice found in various locations. They are worth at least 2,700 Gold and considered challenging to catch.
Zombie Mice from the Laboratory occasionally drop Tattered Mousoleum Maps, giving hunters access to the Mousoleum.