Definitely a later episode given Bear's blue vest and Fox sometimes has the Asian-eyes....I've watched too many of these episodes. Can't pinpoint where this one is from.
Beaver: You've got to be kidding me Franklin.
Franklin: No really, just type in Nelvana, and if Fox were to walk across the studio, he could be a villain in the Redwall series.
Bear: Fox, evil?
Fox: I would have to wear a mask?