The Twin Dragon Breath is an inconsistent ability in that its name constantly changed, though the effects remained the same. Used by Megatron while in his dragon mode, this attack, often voice-activated, sent jets of fire at an opponent. It may be Megatron's most powerful attack, due to him usually using his dragon form to fight and this being the most commonly used attack in that form.
Megatron first used his Twin Dragon Breath in combat with Optimus Prime. While its effects were not apparent, it was easily his most commonly used attack in combat. After his conversion to Galvatron, it was used much less.