Probably won't be quite as simple as that, latest version of brawl- has included the brawlEx clone engine which doesn't play nice with riivolution, which supposedly relates to this.
Was playing around with it. Ran many iterations, copying the bare minimum, including only new files in already included folders, to eventually moving over absolutely everything.
Ended up at one of two states, when copying common2, it died on launch. When ignoring it, the game would lock up when hovering over pichu on the character select screen.
Quite possible I've missed something though (probably...), I'll attach my modified batch should someone want to use it as a baseline. Changed the minus source paths to look for a folder named minus which includes the codes/ private folders.