Baby DK

Baby DK is DK's younger self which debuted in the DS game, Yoshi's Island DS. He is one of the seven Star Children.

Yoshi's Island DS
In Yoshi Island DS, Bowser was looking for the seven Star Children and orders Kamek to kidnap all the babies from the Mushroom Kingdom, including Baby DK. For unknown reasons Baby DK is left behind before arriving at Bowser's Castle.

Yoshi and Baby Mario find him, and then the baby ape helps in saving Baby Peach from the ukikis and after saving her, Baby DK decides to join Yoshi and the babies.

After a long journey they arrived at Bowser's Castle. When they arrived at the top of the castle they fought Baby Bowser and then Bowser, defeating both of them thus saving Baby Luigi and the other babies. Baby Donkey Kong is revealed to be one of the seven Star Children.

Aside from being the most powerful baby, he has multiple abilities that help the Yoshis many times.