The mettaton endings are quite disturbing, because it shows that there is a lot of problems and suffering in the underground and he does'nt Care. And without counting that the "it's showtime!" Playing at the background and a bit of slowed makes it weird.
This is one of my favorite tag teams. Both Sub-Zero brothers in their respective further timeline roles using their new powers to fight together. They should have done more with these renditions working together like old Noob & Smoke