You know you've found a shiny if the grass that rustles sparkles (not like the white stuff, but actual sparkles like when a shiny comes out of the ball). It doesnt increase the chances of you getting a shiny, it just lets you know that you should really go for that patch of grass.
Californication, your teddiursa might get quick feet when it evolves. This is because your teddiursa might have the hidden value for quick feet (2, vs 1 which will give it guts), and that will effect what ability it will get when it evolves. Evolving in emerald will assure that it has guts.
K, I have a Torchic with current evs: 4/100/0/0/0/102. If I want to get it's attack to 248, and it's speed to 252, then I have to
Fight Andrew with Power brace 3 times. Then kill one shinx with a macho brace.
Fight Andrew with Power Ankle 2 times. Then kill one starly with a macho brace.
I just need someone else to confirm that I'm right, because I've messed up before when trying to get the evs right, and it sucks having to go back and redo it.