Guest Stars Birva Pandya voices Jyoti Kaden Stephen voices Tim Matthew Mucci voices Ralphie Mikaela Blake voices Keesha Gabby Clarke voices Dorothy Ann Leke Maceda-Rustecki voices Carlos Lynsey Pham voices Wanda Uncredited Kate McKinnon voices Fiona Frizzle Kate McKinnon voices The Frizz Kate McKinnon voices Ms. Frizzle