The website Archive.org made 145 issues of the acclaimed magazine Nintendo Power available online. It spans the years 1988 to 2001. You can freely browse through them online.

Nintendo Power started as a magazine published by Nintendo of America, and it was this way until 2007. After that it continued independently, until it stopped in 2012. The magazine was famous for publishing tips, cheats and more, which were difficult to come by in the time before Google. Of course, you could always call the Nintendo Hotline...

The editions can be found online here.