Mona's House is a location first appearing in WarioWare: Get It Together!
As the name would suggest, the house belongs to Mona, though it appears as more of a two story mansion with several features, including two fountains, a garden, a pool, and a balcony. It appears during Mona's level in the game's story mode. During the level's intro, Mona appears to be leaving her house on her scooter to go to work, leaving her pet elephant, pig and monkey behind, telling them to behave. Despite this, they proceed to destroy her bedroom throughout the day.
When Mona does return home in the evening, she finds the room in complete disarray, threatening her pets with her boomerang, throwing it into the wall behind them. She then forces them to clean up the room to its original condition. Despite this incident, she leaves them at home once again the very next day, returning only to find the exact same scene.
During this level, the player must complete Mona's microgames to tidy up the room, which brightens whenever one is successfully cleared.
Additionally, Mona's House appears during the cast credits for this game, in the background when Mona and her animals are credited.