Question

Because That+Flash Fire=pain. Throw in a few other things like sun, and coverage and you've got a dangerous STAB.

Comments

DT apparently your rhyming contest with PB10 isn't over.

Answer 1

Lava plume, searing shot: hits all targets (including allies)
eruption,flame burst, heat wave: hits all enemies

Answer 2

So does searing shot

Answer 3

Lava plume hits all pokemon in the field including your ally.

so the answer is yes there is.