Credit to dalla1re via CivitAi: https://civitai.com/user/dalla1re

Description: Vintage, 1990s (style) add to your prompt for more effect, but you really don't need them.

Best keep under 1 weight, 0.5-0.75 being the sweet spot.

Best for SFW but can also do NSFW

https://civitai.com/models/333041/vintage-1990s-anime-sdxl-lora-style-pony