>>54938764>what kind of idiot makes the 3D model first and then concept art version later?This isn't concept art, anon-sama, nor is it reference art (which is likely what you mean when you say that). This is the finalized official art, which has historically been made some time after the game is finished. Also you can tell because the foreshortening is uncannily clean, in such a way that isn't consistent with the previous art or how we mentally envision designs. Furthermore, the fact that the pose is identical to it's in-game model.
Just look at the tail and the back spike. The tail, which is quite large, is almost entirely hidden, and the back spike's trim is geometrically consistent with the in-game model. You can also see this pretty clearly with Paldean Tauros, it's almost 1-1 with the Pokedex image.