This is a code I found years ago. It still seems like the code isn't as widely known as the other wellknown codes, so I want to make sure people know about it. Doing a search on Google shows predominantly pages with cheats for SMC. Anyway, if this is more well known than I'm thinking it is, feel free to trash this topic.
Everyone knows about the 19941018 code for debug. If you play 1,6,7,7,7,2,1,6 then you'll have all emeralds and can use Super Knuckles by attempting to glide with more than 50 rings.