Cursayer2 on 30 June 2007
The green/red/purple pixel effect is caused when the Wii overheats from playing too long, therefore damaging the GPU, which is what creates the weird colors. This can be cause when you leave your Wii on standby mode (The light is orange) for a long time. I recommend you get an intercooler for the Wii, I noticed one at Gamestop. If not, don't play the game for too long. I did the same with Zelda and it caused the weird pixels to appear.
However, I think this is only a temporary problem, because I've never gotten them again.
