Benji

Benji is the dog in the  film series.

History
When Mr. Burns asked Smithers if he knew who Little Monty reminded him of. Smithers guessed Benji and Lassie, before Burns told him it's a person, prompting Smithers to guess, Bob Barker and David Brenner. Burns added that person is always standing and walking, so Smithers then correctly guessed Rory Calhoun.