NOTE:
From now on it'll just be the standard. VEAI being used for grainy 2D animated movies, I cannot find any filters that would reduce it by a lot, closest thing I got was with DPIR (Deep Plug-and-Play Image Restoration) via VS-DPIR plugin in Vapoursynth. But even then it was worse (and slower) than VEAI and there were colors shifts present.
Plot: A canine angel, Charlie, sneaks back to earth from heaven but ends up befriending an orphan girl who can speak to animals. In the process, Charlie learns that friendship is the most heavenly gift of all.
Screenshots are compressed for web viewing [mozjpeg q95], actual quality is higher.