I will preface by apologizing for necroposting, but this is the only thread I can find where this question is appropriate. Do these instructions work for PMEX Remix? I tried adding on multiple costumes for ZSS and when I tried to test it, not all of the costumes I had added were available on the character select screen, and when I entered a match to test the ones that did appear, it froze immediately. Then I happened on this thread.

I tried to follow the instructions as closely as possible, but between sc_selcharacter.pac, infor.pac, stgresult.pac, and StockFaceTex.brres, only sc_selcharacter.pac gives me the option to convert to expanded 50-stock system when I right click the stock texture in BrawlCrate.

None of the codes the first post tells me to replace are in the codes on my PMEX Remix build, so i just added them to the text file underneath all the codes that were there. I made sure to turn both of the unknowns under costume count to true, I added the extra costumes textures, both pac and pcs, added the CSPs and BPs for each, (ZSS' BPs are now in a folder called Temp so I added them there, even moved them each so they would be in order by FileIndex) but when I actually test it, it crashes on the Character Select screen.

Hopefully this will help with a solution, and will help others trying to add 50 costumes to Remix. Thanks.