Honestly the first thing that came to my mind when I thought of fblast starmie was the burn chance on lax and tauros.
Then the burn chance on chansey, the number one switch in to starmie in the game. Also don't forget zam and other starmie.
The point is that you're likely to accidently burn those three with fblast starmie because they're the most common switch ins to it.