Speaking of coencidences, Samus beats[] mother brain[] )where [] is a manually added space) puts you in tourian without the varia, no way of escape, mother brain already dead, and if you beat it fast enough you get the best ending. If it doesn't work try capitalising mother and/or brain. Neat little coencidence. I don't know if it makes rinkas drop stuff, but I think it increases the chance of the game freezing up.
1) the first 6 characters contain only 5 characters. 2) I don't see what that has to do with the topic. 3) that sounds like some random code you would find at GFAQs that everyone's seen before (in fact it rings a bell).