Reverse Engineering Digivice 25th color evolution and D-3 25th color evolution game firmware

I'm seeking an experienced reverse engineer to modify Digivice 25th color evolution and D-3 25th color evolution game firmware, specifically to alter gameplay mechanics. The primary focus is on changing evolution themes, adding new digimon slots, new evolution themes, etc... (Budget: $30 - $250 USD, Jobs: C Programming, C++ Programming, Electrical Engineering, Electronics, Game Design, Game Development, Game Testing, Reverse Engineering)