Flutter Jump

From the Super Mario Wiki

Yoshi's Flutter Jumping.

The Flutter Jump is a move exclusive to Yoshi and Luigi. They can use it to temporarily float a short distance vertically and horizontally. Yoshi uses it in Super Mario World 2: Yoshi's Island; it is a key move to the game. It is available in all games in the Yoshi and Super Mario Bros. series and in Super Mario 64 DS. In Super Smash Bros. Melee, it prolongs the double jump so much that Yoshi has no need for a recovery move. It can also be performed by Yoshi of Paper Mario: The Thousand-Year Door.

Jumps
Double Jump \| Floaty Jump \| Flutter Jump \| Fly \| Gliding \| High Jump \| Hop \| Long Jump \| Power Squat Jump \| Somersault \| Spin Jump \| Spring Jump \| SSB Spring Jump \| Stomp \| Super Dedede Jump \| Super Jump \| Super Jump Punch \| Tornado Jump \| Triple Jump \| Wall Jump