In this time, I know the AI is not perfect enough to create a complete character, but if you have drawing skills, this is a tool to help you get the job done faster
This AI is currently trained for 2 types of SF3 , CPS II, CVS
Here is an example SF3 style:
Text to image

Prompt
Body type: Extremely muscular and bulky; heavily built upper body and legs with exaggerated muscle definition, especially on arms, shoulders, chest, and thighs.
Skin tone: Light pinkish skin with visible veins and shadows accentuating muscle mass.
Head: Bald top with thick brown beard and mustache, rugged facial features with a stern, aggressive expression.
Upper body: Bare-chested, showing full pectoral and abdominal muscles.
Arms: Gigantic and veiny arms; fists are clenched, forearms wrapped in thick red and yellow wristbands.
Lower body: Wears red wrestling trunks with a golden waistband.
Legs: Massive thighs and calves with visible veins and detailed muscle shading.
Knee areas: Patches of dark body hair around the knees.
Footwear: Red wrestling boots with white laces and soles, extending halfway up the calf.
Pose: Fighting stance with knees bent slightly and arms raised, ready to strike.
Img to img

Prompt
white background, 1boy, muscular male, (blonde hair, viking, armor, arm tattoo, bone necklace, abs:1.1), from side, (front kick:1.1), full body
There is full description of prompt, variables to create image in it
SF3
https://civitai.com/images/69544077
CVS
https://civitai.com/images/54623863
CPS II
https://civitai.com/images/58605532
You can use sprites to train this AI