Place it just after the eating or transformation beat, then follow it with an Anime Wow for the reveal and a Vine Boom to underline the new size. Keep it as the centre of the gag, with the other sounds supporting the reaction rather than competing with it.
關於此聲音
This 3.6-second sound effect is built around the idea of a belly growing, stretching outward in a cartoonish swell. It feels playful and a little suggestive, like a transformation caught mid-change, and it works best as a light reaction rather than a shock effect.