Balloon Baby Yoshi is a magenta Baby Yoshi appearing in New Super Mario Bros. U. It allows the player to reach higher places by inflating like a balloon when the player shakes the Wii Remote or presses the Classic Controller ZR button button on the GamePad. Balloon Baby Yoshis can inflate to a maximum of seven times, and will deflate afterwards or when the player lands. Other players can grab on to the player with the Baby Yoshi, presumably the same way players can lift one another. Balloon Baby Yoshi also adds a chorus to the current music, one he himself creates.
- Balloon Baby Yoshi is very similar to Blimp Yoshi from Super Mario Galaxy 2, except that the Blimp Yoshi has a time limit, but Balloon Baby Yoshi has an input limit.