Joanna is a gecko and as a member of Stan's bandit clan, she has reformed. She appears in Riley's Adventures.
- Tress MacNeille - English
- Megumi Hayashibara - Japanese
- Ana Esther Alborg - European Spanish
- Rosanelda Aguirre - Latin Spanish
- Maïk Darah - European French
- Anne Dorval - Canadian French
- Cornelia Froboess - German
- Irene Kuiper - Dutch
- Antonella Rinaldi - Italian
- Cristina Cavalinhos - European Portuguese
- Carmem Sheila - Brazilian Portuguese
- Diana Nunez - Swedish
- Miriam Aleksandrowicz - Polish
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