First , if it's that much of a problem you can delete it , eaither way i don't care honestly.
And secondly , go to south map where there are tons of lakes , go down and you'll see a lake with a little cave besides it ' explore that area , it is my lucky spot , found both , weteye and alpha girl in there and about the commonness , i countered her like 3 times in less than 1 or half hour and i also countered the weteye 2 times there and about the capture rate , not sure because i captured them both with SG the firat time , and if anyone have info about alpha pirate location , let me know.