Why do you keep plugging in the "you keep ignoring" bit? It only servers to be an antagonizer, obviously I'm not ignoring what you're saying. If I'm not understanding your point that's one thing, but do the discussion a favor and let's assume I know how to read, OK?
Oh my gosh,
you are ignoring my point.
If the character shadows do not scale based on height, that's fine, but they
do change based on the light source's angle. For example, a sun shining on a tree from the horizon.
You can see the shadow to the right of Mario's foot. Compare to this picture of Mario...
See how the shadow
stretches to the left? It's way longer than the above picture, and goes in a completely different direction.
Clearly, despite any limitations their graphics engine has in concerns to lighting, it does modify their shadow based on a few certain dependencies.