When Bunnicula Rises is the thirteenth episode of the second season of The Chronicles of Collin the Speedy Boy. It is a crossover episode that features the characters from Bunnicula.
Collin, Ariel and Flappy must get Bunnicula, Chester and Harold back to their home.
- Jason Griffith - Collin
- Kathryn Cressida - Stacie; Ariel
- Cricket Leigh - Caleigh
- Billy West - Eli; Flappy; Carlos
- Phil LaMarr - The Elefish King; Handy
- Tom Kane - VoodooFinger
- Katie Griffin - Hannah A
- Grey DeLisle - T.E Bryte; Wild; Heather
- Eric Bauza - Fang Suckle
- Mela Lee - Nikki; Tootsie
- Chris Kattan - Bunnicula (guest star)
- Sean Astin - Chester (guest star)
- Brian Kimmet - Harold (guest star)
- Kari Wahlgren - Mina (seen in ending)
- Lagan, Haley, the other SoL, the SoL Pets, and the Dinosaur friends make a cameo appearence.
- Collin and Bunnicula will become friends/allies.