I just posted this in another thread about the issue, but I figured I'd put it here to make it more visible since it took me a while to realize the problem. For those unaware, cBliss, the code that expands each character's costume slots to a maximum of 10, doesn't work with Minus as of 4.0b. However:
Should prove pretty useful to anyone wanting to make a custom build.
Not sure why this isn't more widely publicized - I spent the better part of the past few days trying to figure out exactly why cBliss wouldn't work with Minus - but the issue isn't the Minus CSS; rather, cBliss and BrawlEx (which Minus uses to load Roy and Pichu) are simply incompatible. However, it is possible to expand each character to have extra slots using BrawlEx itself, as explained in this tutorial. You need a kc-mm account to view the in-depth explanation, but if you just want to give each character 10 slots it's as simple as putting these files created by the tutorial's author, ShinF, in the appropriate BrawlEx directory and then adding the necessary CSPs/BPs/RSPs/stock icons into the Minus files. As far as I know, ShinF deserves all the credit for figuring this out; just wanted to spread the word since I saw that people here were interested.
Should prove pretty useful to anyone wanting to make a custom build.