Changkey

Tackle Fire (チャンキー) is a fire enemy from the Mega Man classic series, usually spawned by various other enemies. In Mega Man 2 and Mega Man: Dr. Wily's Revenge a enemy called Hothead creates Tackle Fires. It appears in Fire Man's stage from Mega Man, Mega Man: Dr. Wily's Revenge and the first part of the Wily Tower in Mega Man: The Wily Wars. In Mega Man: Dr. Wily's Revenge, they invicible and just appear falling into lava. They also appear in Mega Man 10 in Solar Man's stage where four of them fly in parabolic arcs from one turret to another and back.



Changkey R
Changkey R (チャンキーＲ) is a revised version of the Tackle Fire. Not much changed, though. But it can be destroyed now. They only appear in the intro stage of Mega Man and Bass. 

Changkey Dragon
Changkey Dragon (チャンキードラゴン) is the sub-boss of Magma Man's stage and the first Wily stage in Mega Man 9. It's a skeletal dragon with the body covered by big Changkeys. It rises up and down in a wave-like fasion, while breathing out Changkeys. If they hit the ground, they'll roll toward where Mega Man is.

It's weaknesses are Tornado Blow and Black Hole Bomb. When hit by either weapon, the Changkeys will temporarily disappear, weakening the dragon. The Concrete Shot does critical damage to it, but it's hard to hit the dragon's head with it for it keeps rising up and down.