Abilities » Abnormal Outbreak
When can I use Scatterbug's "Abnormal Outbreak" Ability?
It's pretty clear. If you are not taking the first turn of the game, then when you get your first turn (i.e. the second turn of the game) you may use Abnormal Outbreak. This is the only turn of the game when this Ability may be used.
Source: Forbidden Light FAQ (2018-04-20), TPCi Rules Team (2018-05-03)
Abilities » Abnormal Outbreak
Suppose I have two Scatterbugs in play on the second turn of the game and it's my turn; can I use "Abnormal Outbreak" twice?
Yes, you can use it once for each Scatterbug you have in play during that turn.
Source: Forbidden Light FAQ (2018-04-20), TPCi Rules Team (2018-05-03)