3.5.1 is fine unless you're using Brawlex. Brawlex needs 3.5.1b which is in the original Brawlex download.

I am indeed using BEx, let me try 3.5.1b.
BTW, this only happens on Dolphin, custom music is fine on Wii.

Make sure you have the appropriate file patch code for your build.

 If you want, you can upload your SD contents (before inserting the problematic BRSTMs) to a file sharing service and post the link here. Include a .txt file with the codes included in your .gct and the problematic BRSTM files in the root of your SD card. I'll insert the BRSTM files myself.

Hm, before I try uploading a 2GB behemoth of a file, what FPC is recommended for Brawl? I use 3.5.1 pretty sure, but just send me the one you recommend I use just to be safe, even if it's 3.5.1.
BTW, I tried DMing you on Discord but you don't seem to be online.

EDIT: Uploading video now.

I'm having the same problem. Dolphin just plays a messed up version of the replaced song instead of the one I put in. If it's over a CSE slot, it plays Mushroomy Kingdom's theme at a really high pitch instead.

[Post Merge: November 13, 2017, 09:17:06 PM]

I'll be anticipating that, as this crash has been happening for a while and has started to stump me.
Thank you for sticking with me for these past two days.
Post Merge: November 13, 2017, 09:17:06 PMThis conversation has continued in DMs.

[Post Merge: November 12, 2017, 09:07:22 AM]

Sure. You may or may not have to wait until I get home since my parents and I are about to go somewhere so if it can't go fast enough, we'll need to wait.
Post Merge: November 12, 2017, 09:07:22 AMOkay, I'm putting them in a zip now, note that I haven't removed any of the excess files so you'll see extra folders for when I used Smash Stack to get Homebrew and then renamed the folder, since I just kept that file for a while just in case.
There's also going to be a credits file since this is a modpack.
There's also a character who has incomplete UI at the moment.
Post Merge: November 12, 2017, 11:35:48 AMSorry about the delay. I've sent you a DM with my SD codes and private folder.
The upload didn't finish before I had to leave.

A lot of things. An entire modpack that I'm working on. What files would be relevant to this crash? I can show you all of them. Basically what I don't know is every file that is loaded during this game mode.

No.
Edit: The stages themselves are also completely unmodified.

For some reason, in my modded build, Target Smash seems to crash and I can't figure out why. BrawlEX is on it. It was working before but no matter how many changes I undo it no longer is playable. Crash occurs when you pick a character and attempt to start the game. Since I no longer can identify the issue, I will try all applicable solutions posted here. Thanks in advance for the help.

Hi! I use Riivolution on my Wii U. I see a few necro questions here, so I assume this post is okay.
Basically, everything works, except codes, and Battlefield's SSS UI will not load.
Please help!