Hi, I'm new to ROMs and Rom hacking (like, I've literally never done it before AT ALL) and I've been having trouble getting my game to work after I patched it. It's suddenly much smaller and every time I try to open it it doesn't work and I don't know enough to even have a guess as to what's going on. My og .nds file was about 93.1 MB in size but now it's 635 bytes and I don't know if that's what's supposed to happen after applying a patch.
Could someone explain what I've got to do (or what I might have done wrong) so I can finally play the game?
(Also, I run a Ubuntu, if that means anything.)