Hackmew has a copy on the HG/SS Hacking thread. I belive that's where. You can also do it yourself, but I can't remember the program you needed for it. It ran on a Command Prompt screen, and if you drag the rom to this file, it opens the Command screen and creates a file in the .nds file location with the MIDI sequences and WAVE sounds that are all in the game. That includes SFX, Music, cries, and attack sounds.
I only have the songs and anything else that is sequenced with a MIDI sound.