So I just got a refurbished Wii from Gamestop, it seems to work fine except when I load Xenoblade Chronicles the image constantly shifts to the left (creating a flickering from side to side). The Wii runs The Last Story fine though.
Anyone else have a problem like this? (and is it a problem with the Wii or with Xenoblade?)
Nope. Sounds like a hardware problem. Swap it out.
On the contrary it sounds like the game if his other games aren't having problems. I would try seeing if you can get a different copy to see if it still happens TC, also make sure to double check your video cables to be on the safe side.
Odd that Xenoblade gives you problems, but The Last Story doesn't. TLS practically brings Wii to its knees in some sections, causing everything to slow to a crawl. You might have a bad disc. Do you know a friend who has a Wii? I'd try running it on their system to be sure. If it runs fine over there, it's probably the hardware.