Manga Channel was an alleged Wii channel exclusive to Japan that allowed you to buy manga with Wii Points to view on the console. The channel was allegedly created by SunSoft (a subsidiary of Sun Denshi) as a digital alternative to physically purchasing manga.
Its existence was believed for 12 years, during that time, nothing could be found other than supposed screenshots that could be the manga that the channel distributed. However, in 2021, a user named Rno clarified that there was never such a Wii channel and that those screenshots were actually individual manga distributed by the Wii Shop Channel.