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You did really well, Tom, like I thought you would! I hope you continue to improve and you better be a world champ sometime here soon! ;) I'm glad you had fun though and that's what's important. Perhaps next year I'll be able to go :)
Have you tried to do your walking in the Entralink? That's what I do... I just drop a repel before I warp to the Entralink and then do my steps in there.
If anything moves in a consistent pattern, it does not affect the PIDRNG. Random movements do... the npc to the left of the daycare man is the only one of whom I can think.
For DSi search:
10 second range (as usual)
30-50 VCount
700-7FF Timer0
86 GxStat
0-20 VFrame
If its a DS/DSLite, just change GxStat to 6.
My DSi takes 3 seconds to load the ROM, but my DSLite took 4.
I'm 99% sure that you are actually hitting 50 seconds. Roamer verification only finds the first match so if you search multiple seconds, you will seemingly never hit your seed. Try -0, +0 for seconds and that should fix your problem.
Can someone please help me with RNGing Swarm Pokemon in HGSS? I know it has something to do with the radio, but I can't find any real instructions anywhere and it's proving quite difficult. :(