Bat (Luigi's Mansion: Dark Moon)
From the Super Mario Wiki
Bats are enemies found in Luigi's Mansion: Dark Moon. They attack and do five HP damage to Luigi if they hit him. They can be defeated by either sucking them in using the Poltergust 5000 or using the Strobulb on them. Using the Strobulb on them can make them drop a bill, a heart, or nothing. They can be hidden in furniture or windows after a curtain has been pulled. Gold bats fly in a certain direction before disappearing; they are rarer than regular bats and yield twenty-five dollars when the Strobulb is used on them.
Bats and Gold Bats reappear in Luigi's Mansion 3, behaving similar but looking less decrepit to how they did in Luigi's Mansion: Dark Moon.