Falzar

Falzar is a Cybeast in the form of a Phoenix who was created to destroy Cyber Beast Gregar by an ancestor of Mayor Cain. During their battle he went out of control and had to be sealed in the underground area with Gregar to keep them from causing damage.

They were both released when CircusMan.EXE tried to capture them both for Dr. Wily. He failed and MegaMan.EXE tried to beat him by absorbing him. He took over MegaMan.EXE through Beast Out. The first time he did that, he rejected the Healing Water and nearly deleted SpoutMan.EXE in one shot. Dr. Hikari says after he takes over MegaMan that whenever he awakens, there is a chance that he may take MegaMan forever. Were he to take complete control, even if Yuichiro Hikari did everything he could, he may have no choice but to have MegaMan be deleted forcibly. But he didn't, and MegaMan obtained Beast Out. He is later forced into a CopyBot and is deleted.