Sure Pepe Le Pew is an underrated character, but I am still not sure that alone makes him a good candidate to sell hamburgers. In the end, he is still a skunk.
On a more serious note, as a kid I was obsessed with the weirdness of cartoons with Pepe in them. They were on frequently enough that I am very sure I believed that with just the application of a white stripe, you could make a skunk fall in love with a cat. This of course would work out poorly for the skunk in the end. When a cat encounters a skunk, it is usually not love that they have on their mind.