Master Burglar Mouse
From MHWiki
The Master Burglar mouse is a single mouse found in all locations. It is worth at most ? points and at least 11 gold.
Amy White caught the Master Burglar mouse on September 10, 2008, winning $1,000 (CAD) for her luck. It had been released a day earlier, during $2,500 Tuesday. It is unknown whether the Master Burglar mouse will return in the future.