>>29185593A lot of games were, the last king of fighters sprite games used 3D models to make their sprites, SF3 used rotoscoping for some characters. A lot of Pixel art games or games that use 2D animation at high resolution definitely use 3D models in some aspects to help the process. Of course if we're talking about shit like Sonic Mania or Gunvolt, then yeah those are done pixel by pixel since they're not at high resolution.
But overall, it doesn't matter the process because a lot made pixel art look really good.