Source code is now available, and ttyd64's gameplay can now be implemented in other hacks with ttyd64_gameplay
Download ttyd64_gameplay_1.0.0.rar and follow the instructions inside the file to add TTYD64's gameplay into your romhack (Compatible only with Star Rod).
How to compile
1. Create a completely new dump folder and dump assets there (with Star Rod 0.5.X)
2. In your dump folder, go to battle/formation/raw and delete all files
3. Unzip dump.zip in that same folder
4. In Star Rod's Mod Manager go to: Options (Compile) > Options tab > And check Allow Conflicting Patches
5. You're ready to compile!