>>10309731> they never really tweaked him for 3D the way they had to redesign Mario for 64This. I noticed while playing Odyssey that Bowser's arms and cuffs clip through his shell all the time. His knees are incredibly flexible for a giant turtle. If you look at him while you play his boss battle, he doesn't have a neck. He has to turn around to face you because he can't turn his head exactly sideways.
It's kinda like how Sonic characters don't have necks, so their toys are extremely limited in articulation there too.