Mel Blanc often reused voices, usually for incidental/one-off characters, but once in a while there would be a character sounding a lot like one of his more familiar roles. For example, Mel used his Marvin the Martian voice for quite a few incidental/one-off roles in "Looney Tunes" history, such as that one Native American at the end of "The Daffy Duckaroo" ("No fittum putt-putt!"), Clarence of "Birds Anonymous," Sam's robot ferret in "Lighter Than Hare," even Nero in "See Ya Later Gladiator" (ech)!
There's also the feminine voices he usually used when Bugs Bunny was dressed in drag. On the rare occasion Mel voiced a female character, or if another male was dressed like a woman, they'd all sound a lot like Bugs in drag. (Even in "Porky's Double Trouble" when the Killer Pig was disguised a Mae West caricature, he sounded a lot like Bugs Bunny doing a Mae West impression!)
I'm also reminded of how in the two "Bunny and Claude" cartoons, Mel Blanc used a variation of his Foghorn Leghorn voice for that redneck Sheriff that was always pursuing the rabbit gangsters, albeit without the Senator Claghorn vocal tics (like "I say, son, I say!")
And then as if all that weren't enough, in 1941's "The Trial of Mr. Wolf," Mel Blanc gave the titular wolf a Bronx-esque voice that's a dead-ringer for Bugs Bunny, though this could've also been because the cartoon was made before Bugs Bunny became a superstar.
