If you like this port, you may also enjoy this ground-up effort to clone SM64 on the GBA https://youtu.be/nS5rj80L-pk
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In this case, the creator wrote a custom 3D renderer and recreated the models/meshes to get as close of an approximation of the N64 experience onto the GBA.
I wouldn't call it a port necessarily ("recreation" seems more apt), but it's closer to that than a demake.