The black and white nose in the cartoon might be to emphasize contrast or to give it a classic, timeless look. Sometimes, less color can have more impact.
The big black nose in the cartoon might be a way to draw attention and create a memorable image. It could also play into the overall theme or style of the cartoon.
Maybe the child smells something bad. That could be the reason for holding the nose.
Maybe they are greeting each other or playing a friendly game.
The reason could be to focus on the form and shape of the tortoise without the distraction of colors. It can also give a more simplistic and elegant look.
Maybe it's to make him stand out or give him a unique look.
Maybe it's for a specific style or mood. Black and white can make the hands stand out and give a certain aesthetic.
It could be for a simple and classic look. Black and white makes the legs stand out without too much complexity.
It might be for a stylistic choice. Black and white can give a certain look or mood to the character.
Maybe it's a way for the creator to give the nerd a distinctive and memorable look. Not all characters are meant to be conventionally attractive.
Maybe it's to make the character stand out or give it a unique look.