Use Leonardo Style, Illustration and/or vector art in your prompt to activate the style. Showcase and prompts (all use seed 9119):

Leonardo Style, illustration, no humans, open mouth, solo, horns, dragon, chinese dragon,blue theme, vector art

nezuko,white background, headshot,vector art,

Leonardo Style, illustration, bear, 1boy, weapon on back, jacket, panda, male focus, weapon, eyes, solo, sword, red jacket, furry,

tropical fish in a bowl, vase of lilies, drawing, Leonardo style, blue eye, illustration, vector art

The Leonardo style lyCORYS by Goofy AI mixed into a merge of A Corn is Spinning Photo v1 by Seeker70 and CocaCola (Which includes the Hellmix model by Barons, Kitsch-In-Sync v2 by iamxenos, the cryptids lora by RIXYN, and artistic models merged with the CokeGirls lora by iamxenos)

Original pages:

https://civitai.com/models/119094/leonardo-ai-illustration-15-xl-or-goofy-ai (lyCORIS)

https://civitai.com/models/112013?modelVersionId=124592 (Acorn_Photo_v1)

See also (a different mix of these models without the Leonardo Style lycorys):

Model A: CocaCola

LoRA: leonardo-ai-style-lyCORIS

Output: LeonardoCola

Model A: Acorn is spinning Photo v1

LoRA: leonardo-ai-style-lyCORIS

Output: LeonardoIsSpinning

Model A: LeonardoIsSpinning

Model B: LeonardoCola

Output: Leonardo