This code wouldn't be possible without the work of MrWint's gb-tas-gen which the JNI libgambatte bridge is taken from.
Most of the code has been written by Dabomstew.
Spaghetti code all over the place, this code isn't really meant for public consumption but others have kindly volunteered their CPU time to run it so I'm sharing it anyways.
This is a bruteforce bot originally created to find God Nidorans for Pokemon Red/Blue RTA speedruns. It can be adapted to find desired encounters in other places too.
There are also implementations for checking IGT0 frames for Mt. Moon manipulations, as well as TID manipulations for Red/Blue and Crystal.
The bot runs a modified libgambatte as a core, and spits out giant log files to be combed over manually.
You'll need some prerequisites: ant, scons, libsdl1.2-dev, as well as a Java (8+) and a C compiler.
Clone the repository, build the JNI interface by running ant in libgambatte/java/, and then compile gambatte by running scons in libgambatte/. You might need to change some paths in libgambatte/SConstruct for the JNI because I'm lazy like that.
After that you can put/link the compiled libgambatte library into your library path (e.g. /usr/lib) to have it be detected by the Java runtime, and then fire up your favorite Java IDE and start using it.
Check out this guide by piapwns.
You should skip the step relating to editing SConstruct and you don't need to rename cyggambatte.dll anymore.
The framework is written in Java, so it's easiest to use with Java (or compatible languages).
Main programs are in NidoBot/ShrewBot/LassIGT0Checker/MoonIGT0Checker/CrystalTIDManip/RedBlueTIDManip .java files. Each of these programs can be modified for custom manip needs.
Currently, the programs are set up expecting a roms folder to be created in the root directory. The expected names for the ROMs are: pokered.gbc, pokeblue.gbc, pokecrystal.gbc, and gbc_bios.bin (for the GBC bootrom).
There is a dependency needed right now for the FFEF bot. You can use the gradle wrapper provided to import it (gradlew idea or gradlew eclipse; change to gradlew.bat if on Windows) and add the library to your classpath to make sure the bot runs properly.