Novally's Sprite Thread (C+C needed!)*

[Gors]

This is something that goes ambiguous in many Mario games, but I personally think that if he say, rises the right arm when jumping, his left leg should be forward. After all, his jump is an exaggeration of a running animation frame. Also, this way, his body weight is evenly distributed, and more believable.

Just try it for yourself, run and jump like Mario. It is uncomfortable to put both left limbs forward.