>>48574936They aren't using the same models. Otherwise, that Omanyte model that was hacked into SwSh wouldn't have been so janky and unplayable. XY used .gfmodel, while SwSh I believe is using an updated version of .GFBMDL. If the models look the same to you, well that's the point.
>>48574946If they were smart, they would use an engine that can easily reformat and reconfigure older models for new gens. But instead they resorted to some splatoon/mario kart/botw frankenstein engine.