@StarsDown64 To answer your questions in order:

1. Google "LiveSplit"
2. Any%

If it's the US version then it should work, even on Wii U (as far as I know). Japanese however, is 1.2 and has it patched.

Only attendees who can order this? It looks really nice :o

When you say "Late / On-site registration" I assume this means you could show up and pay at the entrance without pre-booking?

Yeah alttpgba is way better.

Rollin' Deep yo.