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This is pretty awesome and thank you for the work. If i can make a suggestion, i would suggest that you make a branch that is just for the following pokemon because if you try and merge the master it will just give you and error of fatal: refusing to merge unrelated histories
So I followed your tutorial to a T and i also have the the newer battle engine by RHH. This is the error I'm getting make: *** No rule to make target `src/tx_difficulty_challenges.h', needed by `build/emerald/src/pokedex.o'. Stop.