PMC is a simple, yet flexible code injection framework for Pokémon White 2. It's powered by the libRPM dynamic loading library under the hood, reducing the process of code injection to no more than dragging and dropping a file. PMC will hook itself into the game's overlay loading routine during GameInit() and from there on will silently swap patch modules in and out as the parent process needs them.
PMC can be built using the CMake build system, provided you supply its dependencies (ExtLib and libRPM) either in the sibling directory of the repo, or in the Framework's externals directory (a --recursive clone will download the submodules into that location automatically).
PMC targets the ARM architecture, meaning you'll want to pick the appropriate toolchain - specifically arm-none-eabi-gcc - to use with CMake. You can get the latest version here: https://developer.arm.com/downloads/-/gnu-rm
And as always, you can snatch a binary build from the releases page.