Wyvern

A Wyvern is a firebreathing and flying relative of a Dragon that normally nests in mountians.

It first appeared as the normal boss of the first stage of Castlevania: Rondo of Blood. It floated out of reach in the air, occasionally making swoops to attack the character, or grasping onto them with its legs. It was easy pickings for an Axe though. This style boss returned as a normal enemy in Castlevania: Portrait of Ruin.

The boss made its 3D debut in Castlevania: Curse of Darkness, which is set to return in the Pachislot Akumajo Dracula II.

Castlevania: Curse of Darkness
'Not all wyverns are pushovers, as the specimen in Curse of Darkness'' reveals to us. This ugly looking beast is as durable as she is big, and her weak spot (her head) is never a fully accessible target due to her constant movement. Mainly, the wyvern will continue to viciously whip her tail; she will snap her head forward for a sharp-toothed bite attempt; and she swing her head around before crashing into the ground so hard that she'll become lodged in the earth. Naturally, she can breathe heavy flames, all the while whipping its head forward and back to cover a large area. She will other times fly upward a short distance before crashing down her huge frame and causing deadly shockwaves to spread forward. When things get serious, she will take to the air, circle the area, and come flying in with heavy flame breath--she will do this twice per flight. When she lands, she will do so with the same intensity and cause more in the way of shockwaves.'''

Castlevania: Portrait of Ruin
The wyvern from Rondo of Blood is back. There's not much to him, really: Wyvern hovers overhead and either spews multiple flame blasts that hit the ground and bounce unpredictably in either direction or swoops in for an attack with his outstretched claws. A few hits are all that's needed to reduce this guy to a collection of fossils.