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How do you put this on your ROM? If possible, does someone have a patch? How do you add new tiles?
Okay for starters: there is no patch, it has only been released so far as just a post telling you where to put things to apply it manually.
Second: it doesn't work properly. It has its own bugs that he doesn't talk about. He says he used it in his hack called Pokemon Diamond (no idea why he stole the name of a Gen 4 game), however I've looked at Diamond and he doesn't actually use it there.
I am currently working on getting a working version of the patch with as few bugs as possible for Melash for Ancient Emerald. Currently however, there is no working 256 tile hack that does not have a lot of really annoying bugs, such as all the extra tiles being replaced by the font at times, people disappearing, etc. Better to hold off on that for now mate ☺
I am no longer active on this forum. I only pop in from time to time.