Yeah just follow the guide to update to 4.2. Also use WiiSCU 0.23 to update only the Shop Channel. By the way, it's 500 points specifically for an NES game. Unfortunately you can use it for anything else.
@FAST6191 - totally agree. not sure the reasons people use vanced/revanced over newpipe.
I guess it's because of people still wanting to use their yt account (with vanced)?