There's a way to change player nickname?

[Insane96MCP]

Right now in MKWii there's only the "Player" nicknames and miis

[JosJuice]

If I recall correctly, the only way to use a different name in Mario Kart Wii is to create a new Mii using the Mii Channel.

[EblfIYH]

Make your mii through mii channel, you can get it through NUS downloader, make sure you use the pack WAD option.

Then move the wad in your usual game folder.

[Craftyawesome]

I wouldn't use nus downloader. I would just download a dev build to perform a system update.

[Insane96MCP]

I've tried downloading the mii channel.wad but it shows black screen when I try to load it.

[leolam]

As Craftyawesome said, it's easier and more reliable to just perform a Wii system update.

[Insane96MCP]

Ok, resolved by using Dolphin 5 instead of 4.0.2
The mii channel run and I've successfully created miis