A hyper-imaginative, hyper-talkative girl who first appeared in the episode "Go Goo Go". Her parents allowed her to name herself when she was a baby resulting in the full name "Goo Goo Ga Ga". Goo enjoys playing games such as Checkers and Truth or Dare, but she does not know how to play and Mac is the only one who notices. In her first appearance she constantly created friends and finally stopped at the end. However, she has still created a few by mistake or to help on rare occasions. She looks a little older than Mac, though it's never been stated how old she is. She is voiced by Grey Delisle