One way could be to write something like 'The girl's stomach let out a low growl, like a tiny beast awakening inside her.'
Once there was a girl named Lily. She was in a very important meeting at school. All of a sudden, her stomach growled really loudly. Everyone in the room turned to look at her. She blushed bright red. It was because she had skipped breakfast that morning. She was so embarrassed but then she just decided to laugh it off and told everyone she was really hungry.
Another possibility is that she has some sort of stomach ailment in the context of the fanfic. Maybe she ate something bad earlier and now her stomach is protesting. Or perhaps she has a condition that causes her stomach to make noises at unexpected times, which can add an interesting plot twist to the fanfic as other characters might react to it in different ways.
You can use onomatopoeia. For example, 'His stomach let out a low, rumbling growl, like distant thunder.' This gives the reader an immediate auditory sense of what the growl sounds like.
You can use onomatopoeia like 'grumble' or 'rumble'. For example, 'His stomach let out a loud grumble, echoing in the quiet room.' This gives a direct and vivid sense of the sound.
Once upon a time, there was a girl named Lily. She was in the middle of a very important meeting. Suddenly, her stomach growled loudly. Everyone in the room stared at her. She blushed deeply and tried to come up with an excuse. She said that she had a very hungry pet mouse in her pocket, which made everyone laugh.
You could use phrases like 'Her breasts were full and throbbing with an ache that seeped into her every movement.'
You could say 'her black skin was a warm, inviting shade, like the first shadows of twilight'. This gives a sense of the color having a certain mood or atmosphere. Also, 'black skin that had the depth of a bottomless well' is a more creative way to make the reader think about the profundity of the color.
She could also be quite matter - of - fact about it. If she's with close friends or family, she might just laugh it off and say she's really hungry and needs to find something to eat. Maybe she'll even joke about it and say her tummy has a mind of its own.
One scenario could be when he's in the Forbidden Forest. He's been out there for a while, perhaps on a secret mission, and he hasn't had a chance to eat. His stomach growls, and it might even attract the attention of some of the forest's creatures. It would create a tense moment as he has to deal with both the threat of being discovered and his hunger.
When Celebi initiates the transformation, it's like a wave of emerald light washes over the target. First, there's a tingling sensation all over the body. Then, the physical features begin to shift. If it's a transformation into a flying - type Pokemon, the back might start to bulge as wings start to form, feathers sprouting out in a flurry. The face would change too, the nose becoming a beak perhaps, and the eyes taking on a different shape and color. Every detail of the transformation can be described in a very tactile way, making the reader feel as if they are witnessing it firsthand. You can also add in the sounds, like a soft whooshing as the transformation energy moves around.