Going to keep this brief because I'm too lazy to make a full writeup. This model and training method far surpasses anything we've seen with NovelAI from 2023. It trains at 1024x1024 based on SDXL.
You can refer to https://civitai.com/models/62125/lora-lazy-training-guide for tagging etc.
Refer to https://github.com/bmaltais/kohya_ss for the kohya link.
Download https://civitai.com/models/257749?modelVersionId=290640 (trust me)
Download https://files.catbox.moe/dvx8me.json or the .json from the attachments - When opening Kohya, use this as your configuration (click on config at the top on the LoRA tab, open, select this json).
Point the training model to the Pony model.
Change your save location to wherever you have your LoRAs.
Tag all of your images with score_9, source_anime. Set your folder repeats to 1.
Train.
When generating on the above pony model, put scores 6 through 4 into your negative prompts, and add 'score_9, score_8, score_7, source_anime' to your prompt.
I STRONGLY recommend using an artist LoRA. Try https://rentry.org/ponyxl_loras_n_stuff for LoRAs made specifically for the pony model.
Generate. It should look good. The results speak for themselves.
The pony model is the best we have for local anime at the moment. It blows base NovelAI out of the water.