While running around, Sonic found some free juice lying around out in the open. Sonic though, it’s free, so why not? Little did Sonic know, this juice would have life altering consequences. The juice was some of the best they have ever tasted, but soon after taking a sip, sonic’s stomach started to expand with the very juice they just consumed. Maybe it was not the best idea to drink mysterious liquid you found in the woods.
Once the juice had reached sonic’s upper chest and neck, their cheeks started to expand with juice, leaving a strong sweet taste of the juice in their mouth. The taste was much better than before and almost made them forget for a second about their rapidly enlarging body.
Sonic’s arms, legs, cheeks, and especially their belly are now swelling with a thick and sweet juice. Sonic can hardly believe what they are seeing and feeling. They press their soft and expanding belly, feeling the juices push outwards.
After a bit more swelling, their arms and legs become too full of juice, and become unmovable. All they can really do now is watch their cheeks and belly continue to expand with juice. Sonic better get used to being rolled around to get anywhere now.

Don’t worry sonic, I think you look much better this way!