Have you made sure the Wii is updated to 4.3? Did you input the correct MAC address into the PortablizeMii pack generator and select the correct region?
If you choose the wrong region or put the wrong MAC, the letter usually won't show up, and if you're on the wrong version it would probably crash... Try deleting the private folder and the boot.elf file on the SD card. Then head to https://please.hackmii.com/ and put in your info there. Make sure to leave the bundle the installer checkbox checked, and drag their private folder and boot.elf onto your SD card.
Hi there I'm new to portablizing Wiis and there is no clear tutorial on how to install portablize Mii to a Wii could someone please point me in the right direction thanks