Steel Empire/YMMV

That One Attack: The Final Boss does one when low on health, he charges up and fires out a nearly unavoidable wall of flaming death multiple times in rapid succession with a short cooldown between bursts. These walls of death cancel out your bombs and your shots and do collision damage with your plane. The only way around it is to hide behind asteroids or spam your Lightning Bombs (for temporary Mercy Invincibility). The 3DS remake makes this worse, where the boss now fires shots aimed at you while you're attempting to hide behind asteroids, in order to flush you out, and you have to move very carefully behind the asteroid to avoid damage.
- The previous attack is even worse, in which the boss fires fireballs and fire streams in sets of 3, is rather difficult to dodge effectively despite the order that the shots are fired from, and unlike the wall of flaming death, these aren't blocked by ANYTHING.