Illustrious
Ideal resolution is 864x1152
Trained at 1024 with buckets at 1152x1536
Weights best at .9 - 1.0
CFG best at 3.5 - 5
Add "white border" to prompt to be more authentic to the originals.
Pony
The Illustrious version clearly handles pixel art better but it was requested.
Ideal resolution is 864x1152
Trained at 1024 with buckets at 1152x1536
Weights best at .75 - .9
CFG best at 5
Add "white border" to prompt to be more authentic to the originals.
SD15
Ideal weights appear to be .75 - .85.
Trained at 576x768.
With LoRAs: the weight might require lower values.