Ah, I see. Well, Bowser having a crick in his back preventing the spikeball move could easily be phantom pain from a blockage in his hammerspace powers anyway.
I don't consider Dry Bones to be accurate reflections of what the actual skeletons look like, but rather, are magically enhanced (with magic also moving the embellished bones in place of muscles). I mean, look at those at those solid hands and feet: only the thumb has a free metacarpal necessary for motility, and it's acting more like an extra phalange. The woeful lack of vertebrae in the tail also suggest there's fusion going on otherwise the real tail wouldn't be as flexible as it is in life, skulls that solid would weigh a tonne, there looks like there's barely an inch of muscle mass between the arm bones and the bracers, the fibula connects to the back of the knee (which is at least better than non-Dragon-Koopa Dry Bones, which only have tibias; both varieties are missing their radius by the looks of it too), and not even snakes have wraparound ribs like that. Plus, shoes, gloves and hair are hardly skeletal features.
