Rocket J. Squirrel was one of my all time favorite characters. He was a stabilizing force for the goofy Bullwinkle. Their cartoons were the kind that you appreciated more as you aged. It says a lot for the clever dialogue.
Yeah, you're right about Mel Blanc. But for some reason I can't explain, somehow the Rocky/Natasha connection bummed me for a while. No rhyme nor reason in my head sometimes.