I wouldn't know I'm just a kid.
There is no way to 'up' your chances of finding a ShinyPokemon in any of the Versions.
The chances of finding a wild Wailord is 1% while surfing in Route 129.
Yes.
Well your chances cant be said, but in time you'll meet him or her and you will no then and there.
about 49.999
aperfect beutician
25%
The "chances" of finding ET's has already been acomplished, as there are at least three beings in varied states of preservation, resulting from the Roswel crash of 1947.
Confucius
1 in 60,000
Very small :)
50% if I recall