Garn is voiced by Fred Tatasciore.
Debbie is voiced by Mindy Sterling in first film and Catherine Lavin in sequel.
After Humphrey loses his and Kate's ride over a cupcake, Garn and Debbie drive off never to be seen again in the film. Garn is a big, strong motorcycle gang guy while Debbie is a short, sweet librarian lady. Garn appears to be somewhere in his late 30' s while Debby appears to be somewhere in her early 40' s. As explained by Marcel and Paddy, they met in a book store where Debbie worked that sold beer, where the opposites attracted and met.
It's revealed that Garn and Debbie broke up over an implied misunderstanding.
- Garn and Debbie's relationship of how "opposites attract" most likely symbolizes Kate and Humphrey's own relationship; despite being considered against Pack Law.