The original creator (Mr. Valery) hosted the tool on GitHub and GBATemp . As of this writing, the most stable version is 1.6.0 .
Resorep remains the easiest entry point for texture swapping. It lacks the complex scripting of 3DMigoto but wins on simplicity. If you just want to change a character's eye color, a costume texture, or a UI element, Resorep does the job in 10 seconds.
Have a favorite Resorep texture pack? Drop the link in the comments below. Happy modding