LoRA of Mark from the Coral Island, trained for PonyXL.
CoralMark is the trigger word. The tags, Plump, Burly, and Muscular may also be helpful in giving him some mass. He's been trained on a couple of outfits:

Outfit Spring, with these tags

Blue Open Shirt, T-shirt, White Pants, Belt

Outfit Summer, with these tags

Pink Hoodie, Sleeveless, White Pants, Fanny Pack

Outfit Fall, with these tags

Brown Shirt, Backpack, Scarf, Black Pants

Outfit Bathingsuit, with these tags

Swim Briefs, Goggles Around Neck,

And you can of course mix and match as you chose!