Yes thats right. Also 223 222 224 249 are all custom or cIOS. You only need to update the IOS the game uses to run. ( Unless of course your cIOS are out of date..you can run a syscheck to find out)to update them i have to download them by(nus) then copy them into wad then install them by wad manger and the ios will be up to date ...... is that right ?? or there another way
Another way you can install the IOS your game needs is using dop-mii.