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You know that you have to get the silph scope before getting to pokemon tower and the silph scope is located in rocket hideout. For some stupid reason while running tests on my rom hack of Pokemon Red when the player enters rocket hideout the screen turns black and the game crashes. If anyone doesn't know what I'm talking about then you can watch this video to see what the bug looks like: https://www.youtube.com/watch?v=c3TjiQ3woqk
I hope someone knows the right solution to fix this bug.