I've been wanting to go back into playing SSBB on Dolphin. But suddenly, I can't use Gecko anymore because of something about my Dolphin "using IOS 58". When I tried using the older builds of Dolphin I have, they also don't work. My other one says it's "Using IOS 9" and always "Error: No DVD Found" despite me setting Brawl as default ISO, then the other one suddenly saying about "invalid SYSCONF". I haven't touched my Dolphins since months ago.
I don't know what any of these means and there is no helpful guide about it.
Update to the latest development version of Dolphin. Old versions of Dolphin used bad assumptions to bypass the IOS 36 requirement but that caused a lot of subtle problems. IOS 36 can be downloaded and packed into a WAD with NUS Downloader and installed in Dolphin via the Install WAD menu item.
Thanks, I was able to boot up Gecko but it suddenly freezes as soon as Brawl's menu pops up.