Flashbug - where to find???

I need more of this to make flashbombs.

any quest just bring bugnets
you can also download a update off the main menu that makes the woman outside guild hall sell them she also sells other good items

I found this in area 2 (Jungle) of ***Quest

but i don't understand when you say download a update concerning the woman?

after each Quest i do always come to her, her items change but she never sells me flashbugs...

They never do sell flashbugs, two ways to get them are

1) get them from your pokke farm, more upgrades gives you more chances to catch them in farm.. among other rare bugs you may require.

2)try to take on quests that has multiple bug collection points, one such as you have found is in the jungle.. there's also 3 in the swamps... 2 of which has a good chance for flash bugs.