ROM Hack Best way to edit sprites in Heart Gold & sould Silver

drag0nscythe

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I have been trying at it for 6 hours and now I need help. I have been trying to edit trainer sprite on the overworld but every avenue I have tried has resulted in errors and problems.

First I was going to try and use btxeditor to extract out the overworld sprites and than edit. However for some reason the program picks and chooses which files it will crash on and makes it very difficult to edit all the files I need.

Next I tried to do what a video suggested and use Poketex and Tilemolestor to perform the editing. Poketex worked greatly in getting the sprites out but when trying to edit with Tilemolestor, I found nothing but problems. The tile editor cuts off parts of the sprites when the file is loaded. It also is very fickle and sometimes wont allow resizing or anything.
I was hoping that I could simply import the BMP file back into Poketex but that doesn't appear to work that way.

Next I tried Tinkle to export/import sprites. It seems to work well in finding the sprites and exporting but when I import, everything messes up. And usually after an import, the program will crash shortly after (using 0.92).

After trying all three methods, I am still at the strarting point as I can't seem to get any edited sprites into the HG/SS roms. Are their any newer methods, tools, techniques available to make sprite editing in HG/SS more easier?

For some info about what I'm trying to do, I want to edit the overworld sprites, animated sprites, and pictures of the trainers to add in/change the trainers.
 
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