My son finished a Unity tutorial that showed him how to create a simple 2D Mario game. As an incentive and encouragement for his hard work I would like to have someone make a sprite sheet just like the Mario Sprite sheet but I want it to look like a cartoon version of him. For his animated costume I would like the character to be wearing the wrestling outfit he wears at school. If possible I would like to just replace the 2D Mario sprite sheet with the new sheet and have it work as designed.
I would also like some instruction after delivery so that my son will understand the steps it takes to create a sprite.