The Yoshis. The white and orange Yoshis shown here do not appear in Super Mario Bros. X, however.
Yoshis are a dino-like species featured in levels throughout Super Mario Bros. X episodes. They are helping characters from many Mario series games. Make sure that when you come across one, use it.
Colors of Yoshis
Yellow Yoshi
There are many different kinds of Yoshis. Each color has a special power. Below is a list of all Yoshi colors in Super Mario Bros. X:
Green: Green Yoshis do not have a special power.
Red: Red Yoshis spit out fire when they hold a koopa shell in their mouth.
Yellow: Yellow Yoshis stomp when they hit the ground with a shell in their mouth.
Blue: Blue Yoshis fly with anything in their mouth.
Pink: Pink Yoshis spit out enemies as vegetables.
Purple: Purple Yoshis can ground-pound by pressing down while jumping.
Black: Black Yoshis have the powers of the Red, Yellow, and Blue Yoshis combined.
Cyan: Cyan Yoshis spit out frozen enemies.
History in Gaming
Yoshis first appeared in Super Mario World as the inhabitants of Yoshi's Island and the main characters you were trying to save from Bowser (other than Princess Peach, obviously). Since then, they have appeared in many Mario series games. There is also a specific character named Yoshi, a green Yoshi that befriended Mario on his travels and has stuck with him ever since, appearing in many spin-off games like the Mario Kart series.