Baby Boo is a younger version (also a kid of king boo) of the Boo. He is quite similar to a Boo but, has smaller teeth and bigger eyes and tail. He also has a rattle and a pacifier. He can shake the rattle to make music notes come out and hit you. He can also use it to call other Baby Boos. Their leader is Prince Boo.

Babies

Baby Mario | Baby Luigi | Baby Peach | Baby Daisy | Baby Wario | Baby Waluigi | Baby Donkey Kong | Baby Bowser | Baby Dry Bowser | Baby Bones | Baby Yoshi | Baby Funky | Baby Birdo | Baby Kamek Baby Rosalina | Baby Diddy Kong | Baby Dixie Kong | Baby Petey Piranha | Baby Geno | Prince Boo | Baby Toad | Baby Toadette | First-Mate Syrup | Baby Tiny Kong | Baby Koopa | Baby Blooper | Baby Boo | Baby Swanky Kong | Baby Candy Kong | Baby Crash | Baby Maria | Baby Luise | Baby Waria | Baby Walice | Baby Metal Mario | Baby Eyerok | Cheepy | Baby Sonic