If you are looking for actual gameplay modifications rather than illustrated guides, you might be interested in the or Amy Rose in Sonic 1 , which are fully playable ROM hacks that swap character genders and abilities within the original games.
: Categorized by character (Sonic, Shadow, Silver, etc.), containing the progression art for each transformation. sonic sex change guide repack
Sonic is about friendship, heroism, and running fast. Romance is a tiny garnish, not the main dish. If you are looking for actual gameplay modifications
: Textures, 3D models, or sprite sheets designed to alter the physical appearance of characters (e.g., Sonic, Shadow, or Amy) to reflect a different gender. Romance is a tiny garnish, not the main dish
— A humble fan who believes every character deserves a second lap. 🏁💙❤️🖤
If this "repack" refers to a specific file or a blog post you saw on a site like Tumblr or a specialized forum, it is likely a fan-made modification or a piece of transformative fan works (such as "headcanon" guides) rather than a technical game guide.
You are now ready to apply the to your own project. Use this checklist during your revision phase.