Misc adding friends to games or address book

[fattest]

i just modded my friends wii and wanted to add eachother as friends in mario kart and a few other games, but it always says the registration has to be confirmed. when i boot up the other wii it never receives any message about the registration, and when i try to add the previous wii to the other wii's friend list, the same thing happens. do both wiis need to be online simultaneously to confirm each other or something?