Even though I already tweeted about this last week. I think it is worthy of another mention here...
The Nintendo Ringtone Pack is just what my phone needed. There are currently two packs available (both free). The first pack includes sounds from Duck Hunt, Excitebike, The Legend of Zelda, Mike Tyson’s Punch-Out, Super Mario Bros., and Super Mario Bros. 3. The second pack includes Castlevania, Contra, Double Dragon, Metroid, Ninja Gaiden, Super Mario Bros. 2, and Teenage Mutant Ninja Turtles.
Download here: Ringtone Pack 1 & Ringtone Pack 2
Thanks to @snoopmikey