The red nose of a cartoon dog might have symbolic meaning, like representing playfulness or a bit of mischief. It could also be a way for the creator to add a visually distinct feature to make the dog more memorable.
Maybe the dog got into some kind of adventure that made its nose turn red. Or it could just be a unique feature to make the dog stand out in the cartoon.
The red and yellow cartoon dog might have a curious personality. It could be constantly exploring new things and getting into adventures. Also, it could be very loyal to its friends and family.
The combination of yellow overalls and a red shirt on the cartoon dog could make it stand out. Maybe it has big eyes and a friendly expression to match the colorful outfit.