I fixed it. I think I copied the code wrong cause when I remade my GCT file it worked fine.

Thanks for your guys help. I'll see if I can get my brawl box working.

Troubleshooting:
I tried downloading one of Phoenix's songs (the Metal Battle(melee), for battle field) threw it on my SD card under private/wii/app/RSBE/pf/sound/strm and named it X04.brstm (for battle field). Then I ran my Gecko. In the brawl menu I went to Options/My Music and selected Battlefield. I turn all the music except for "Battlefield" off.
It is still only playing the song battlefield, Q_Q. Could it be my Gecko version, or perhaps I'm naming them wrong?

Yes, I got vgmstream, can't figure out how to work it. Test.exe just crashes after I run it. The read me doesn't explain that well.

I tried opening one of my brstm songs on BrawlBox and it only shows me sizes, loop points and etc.. Is it supposed to play songs?

The file size is aprox 9500KB. My WinAmp isn't working for brstm formats. I could probably fix the problem following the guide, but I didn't think it was that necessary.

Are you PAL?

I use NTSC. Perhaps it's a problem when I created the song I can give a brief writing on what I did.

I downloaded all tools and placed them in C:/brawlmusic (no spaces). I then ran gwave and opened a mp3 file song. I saved the song in my brawlmusic folder as a .wav 16bit stereo. I didn't edit the song at all because I didn't think it needed it. I then right clicked the left speaker(green), pressed channel, and then saved selection as "loftyL". I did the same for the right speaker and called it "loftyR". I then ran Start.bat, selected B, typed in w23, and then deleted w23R & w23L. I renamed both loftyR to w23R and loftyL to w23L. I then continued with Start.bat and waited. When it asked me to input the starting point I typed 0 and continued. I named my brstm file lofty. I opened my EditedSongs folder and renamed it to X03. I then stuck it into my SD card under strm.

Not sure if this will help, but I'm thinking it may be because of the rename, I'll test it out.

No, I also made music for X02 and X05. Still none of them seem to work.

It's great to see a guide with every download link working.
I am only having a few problem getting my songs to play on my system..

I've followed this guide and your video. Everything was working fine but after placing my .brstm files in my SD under private/wii/app/RSBE/pf/sound/strm and naming my song X03.brstm and then running Gecko it still only plays the original Battlefield song.
I've tried using other brstm converters but nothing seems to work.

Any help would be great, thanks.