A huge, bird-like dragon known as the Hraesvelg causes the weather in New York to change drastically, and the XGBs must stop it before the weather threatens the city.
- Egon Spengler - Maurice LaMarche
- Janine Melnitz - Pat Musick
- Kylie Griffin - Tara Charendoff
- Eduardo Rivera - Rino Romano
- Roland Jackson - Alfonso Ribeiro
- Garrett Miller - Jason Marsden
- Slimer - Billy West