Technically another character mash-up. This time involving Digby (a humanoid woodchuck) and Dagby (the otter).
I pretty much went for the "I Was a Teenage Marine Critter" dream sequence route, with Digby trying on some experimental specs that gave the illusion of ocean lifestyle. Side effects include spontaneous TFing. The longer he kept the glasses on, he gradually started to look and act like a river otter(!)
Digby (in Dagby's voice): These aqua-dook glasses have really gained my confide...