I mean, is there a homebrew that can do what CRAP does on the computer(create USB loader channels) only its a program that can be used on Wii to create channels.
Well the easiest way is to make a channel with WiiGSC (previously Crap), then use CustomizeMii to extract the banner, icon, and sound. You could also use WiiScrubber to extract opening.bnr if you have the ISO, then extract banner.bin from it.Then is there somewhere I can get a Metroid Prime Trilogy banner?