Syvalion

 is an arcade shooter video game released by Taito in 1988 and designed by Fukio Mitsuji, creator of "Bubble Bobble". The player controls a golden metal dragon which flies around, breathing fire at its enemies while collecting power-ups to recharge its fire. The enemies are robots and tanks. At the end of each level, the player fights a boss.
It was re-released for the PlayStation 2 as a part of "Taito Legends 2" in 2006.
Trivia.
In "Dariusburst", also from Taito, the boss named Dark Helios changes form and appears to be the metal dragon from Syvalion.