What do you call this type of top down, not really 3D, perspective?
It's not isometric, it's not one point, maybe top down?
I want to Google it and don't know how.
It's closest to a view called a three-quarters view, a type of axonometric projection, in between a side view and top down one. It's "[a] method of portraying three dimensional space in a two-dimensional plane ... [very] popular during the 16-bit era for JRPGs." source.
It's still used in games today because of the high performance and artistic draw.
It's not truly perspective. It's an artistic interpretation of a 3D element, but not adhering to any mathematical perspective grid.
The closest to a true type perspective would be one point perspective.
It could also be considered foreshortening outside of the perspective context.