Sunshine Gunderson is Skye's baby sister. Although approximately 3 years old, she can walk very well but can't even talk. She has her father's face and her mother's hair color.
- Despite being at least 3 years old, she can't talk. The average human should start learning to talk before 2 years old. As seen in "Get Elected!", the only word she can say is "Snuggums".
- In the same episode she owns a baby doll named Baby Snuggums which has barfing and heating action from kissing or hugging it respectively.
- Although not credited, it's most likely Katie Leigh (who voices Skye) who does Sunshine's vocal effects.
- After Maxus and Jerome accidentally reveal themselves to her in "Get Surprised!", she might develop a fear of squirrel in future episodes.