Brainiac is a chimpanzee (specifically an eastern chimpanzee) who is smart and made her first appearance in "Brain Power" and she reappeared in "Talk to Me", "Can You Feel It?", "Buddies" and "Ants and Eaters".
She is very adept at using machinery and computers.
Brainiac as she appeared in "Mystery Animal" in "Brain Power"
Brainiac as she appeared in "Mystery Animal" in "Can You Feel It?"