Microphone
From the Super Mario Wiki
This article is about the Nintendo DS Microphone. For information about the Nintendo GameCube Microphone, see here.
The Microphone is a feature on the Nintendo DS. On the original DS, it is at the lower left-hand corner, right below the screen. On the DS Lite, it is at the middle in between the two screens. Blowing into it will allow events to happen in the game that the player is playing, such as Toad Jump. In other games, the player must say words into the Microphone.

