Car Yoshi

Car Yoshi, also known as the Car, the Vehicle, or Speedster-Yoshi, is a form Yoshis can assume in Super Mario World 2: Yoshi's Island and Yoshi's Island: Super Mario Advance 3 by touching a morph bubble containing its picture.

Super Mario World 2: Yoshi's Island / Yoshi's Island: Super Mario Advance 3
Car Yoshi moves faster than a regular Yoshi and is smaller, enabling it to fit through small openings. Pressing will stretch its wheels for a short time, making it possible to avoid enemies or reach higher platforms. When repeatedly done near a wall, this also enables the player to "climb" up the wall. If hit by an enemy, Car Yoshi will be briefly unable to move.

In Super Mario World 2: Yoshi's Island, a morph bubble for this form appears only in the stage Lakitu's Wall. In the remake, Yoshi's Island: Super Mario Advance 3, this form appears in the Secret Stage Go! Go! Morphing!.

Super Smash Bros. Brawl
In Super Smash Bros. Brawl, Car Yoshi appears as a sticker. In the Subspace Emissary, it can only be used on Yoshi to boost his tail attack power by 7 points.

Super Mario-kun
The Vehicle form appears in volume 14 of the Super Mario-kun. It drives around, but Baby Mario, as Superstar Mario, notices it and gives it a redesign.

Super Mario World 2: Yoshi's Island

 * Instruction Booklet: Tip-toe with either the Y or B Buttons.
 * Shogakukan guide: 背伸びをすれば、障害物をよけてつっ走れる. (If you stretch high enough, you can dodge and run past obstacles.)

Trivia

 * Despite the artwork of the Car being light blue, the Light Blue Yoshi never gets an opportunity to morph in a Car.
 * Unused tiles depict the Vehicle form with more heavily-shaded eyes than the final ones, which lack shading on the eyes entirely (except when the wheels are outstretched).