Baby Mario

Baby Mario is, unsurprisingly, Mario's form as an infant, He was first introduced with Baby Luigi in Super Mario World 2: Yoshi's Island and sometimes with his brother, has since become a popular character in spin-off games.

Yoshi's Island
Baby Mario was kidnapped by Kamek at the start of the game, but was dropped from the sky, where he befriends a group of Yoshis. Who help him rescue his also kidnapped brother. Baby Mario spends most of his time on Yoshi's back, unless Yoshi is hurt in which he flies off in a bubble crying, so Yoshi has a time limit to get him back. Another addition is the Star which when Yoshi picks up, Baby Mario gets a cape and temporary invincibility, win which he can run fast and climb curved walls reaching previously inaccessible areas.

Mario and Luigi: Partners in Time
Baby Mario is one of the four main protagonists in Mario and Luigi: Partners in Time. He is the first character you may play as, starting off in a duel with Baby Bowser who was attempting to kidnap Baby Peach. Then, after the adult forms faint, Baby Mario and his brother, Baby Luigi. Mario and Luigi then encounter the babies, and after Stuffwell, the talking suitcase, convinces the adults to team up with the babies, the four stay together for the game. Though Baby Mario is brave and strong, he is still a baby and often cries and screams and gets scared easily, much like Luigi, baby or not. Baby Mario is also needed to perform hammer attacks piggybacked for Mario, and access Fawful.

Other Appearances
He's also been playable in: Mario Golf, Mario Tennis, Mario Kart: Double Dash, Mario Superstar Baseball. Mario Kart Wii and Mario Super Sluggers

Bebé Mario