How rare is it to find a shiny Kingdra in P2 Labratory?

Question

how much percent?

Answer 1

1/20 * 1/8192 = 1/163840 (about 0.0006 %)

nice one

Answer 2

The chance of finding a random shiny in the wild is always 1/8192, including the p2 labratory.
the only pokemon that's guaranteed to be shiny is gyarados in lake of rage HG SS.