Are you sure about that?

I dunno, man. Have you seen the videos? They've got the wireframes of pals overlaid with pokemon, and the size is exactly the same. Sure, the basic shape is slightly different and some accessories have been changed, but it's very close. The one that looks like Luxray has the same exact diameter of tail in the same exact spot - the only difference is that it's a bit shorter with a different tuft at the end. Really seems that for some of these pals they just modified existing assets.