Access wii shop channel without updating companiondatingservice com
The latter two could be purchased by either buying a points card at a retail store, or by entering your credit card into the channel.
On January 31, 2019, the Wii Shop Channel was shut down, sadly.
Some games also contain 4.3 updates, which have the same issues as the 4.2 update games.
Super Mario Galaxy 2 (and likely further games released after it) contains a 4.2 update including a boot2v4 update.
Wii Channels are applications available for the Wii console through the Wii Menu.
The Wii uses several pre-installed Channels for many of its basic functions, such as launching discs, buying Virtual Console games, and managing Miis.
To actually upgrade, use the steps on the Upgrade page after reading this page. It's slightly harder to install homebrew on 4.3 than on earlier firmwares.
This is safe and the recommended way to upgrade the Wii, but only if you first take precautions (listed here). You can safely upgrade after installing homebrew, instead.