What exactly do you mean with "look at the game files"?

You can use Wiimms ISO tools ( wit.wiimm.de/ ) to extract an ISO or WBFS image (wit extract game.iso folder) and then look at the files inside the game. Depending on the file formats you might be able to use the SZS toolset ( szs.wiimm.de/ ) to look at some of the content, but the files might also be game-specific file formats.