Maybe. Are you looking for a Windows application? -- I'm assuming you want a GUI, and not like a command-line tool (not a big deal, but just confirming). -- I'm assuming you have no preference if I make the tool open source or not (I'm a proponent of open sourcing these types of things, so that if I fall off the planet, someone else can pickup where I left off).
I haven't googled anything yet, but in the interests of not duplicating the effort, do you already know:
Are the technical details of this process available somewhere? (Is someone already doing this? Is the way the images are stored in the ROM documented somewhere? -- or am I pioneering this from scratch? -- if the latter it could take a bit longer, and has a lower chance of success as IT may involve some low-level crazy debugging and such, and I might not necessarily be able to figure it out in a timely manner...) -- working with low level bits and bytes is not a big deal for me, as long as I have a document/map of how those bits and bytes should be interpreted; reverse-engineering on the other hand could be a little more painful.
EDIT: Also, I haven't done any DS emulation yet, what's the best emulator for playing the games (in your opinion), [and if different: what's the best emulator for doing technical stuff, debugging, dissassembling, etc. -- or are there any tools available right now for any of this?)
Almost Finally:
I found a copy of the Heart Gold ROM; but I want to make sure we're using the same version -- can I confirm the following with you?
File Name (not necessarily relevant): 4780 - Pokemon HeartGold (U)(Xenophobia).nds
Important:
File Size: Exactly 128 MB (134217728 bytes)
One of the following:
SHA1 File Hash: 30793E274FB4C7BA070AE226EDBDFE355504B1F5
MD5 File Hash: AE2A483D0A5E8130D39F44F41A86DF57
SHA256 File Hash: 2767E2CB80ACC206074232C10A3B74A479E45A472F2EF9F84BBFC55E36AD962D
(As long as we have the same file size and one of the file hashes matches, we know it's very high probability that we have the same exact file.)
Finally-Finally:
Is there another thread more appropriate for discussing this heart-gold work or is this thread okay?