I've tested your battle engine (https://github.com/Skeli789/Complete-Fire-Red-Upgrade), I tried to compile 3 times the engine, and when I open de ROM "test.gba", appear the "2004 Game freak..." and then, the the game crashes with a black screen.
The code is inserted in 0x900000: (I'm using a clean ROM)
The code is inserted in 0x900000: (I'm using a clean ROM)
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