Best used with this script, with colors set to around 16: https://github.com/C10udburst/stable-diffusion-webui-scripts/blob/master/pixel_art/pixel_art.py

Trained on Pokemon sprites. Can be combined with Pokemon LoRA (Ken Sugimori Style) for pretty good results!

Best used with Pony Diffusion V3. Despite the name, Pony Diffusion is not just for ponies, also including various other data.