My prompt for this ended up being
Groudon is a sexy anthro Godzilla-like Pokémon. Her body is primarily vivid red, covered in thick, armor-like plates with very thick bold black lines separating them, her breasts and underbelly are light gray. She has a row of sharp white spikes running down her back. Her glowing yellow eyes that give her a fierce, primal look. Her fingers and toes end in large white claws. She is muscular and fat with large breasts and crimson nipples.
Seems to work better than anything else, still doesn't look much like Groudon though, I tried using the description from Bulbapedia as a basis but had to keep tweaking it to get anything even remotely good looking