Kerberos

Kerberos is, for all intents and purposes, the Roader enemy of Mega Man Zero. The Kerberos appears in MegaMan Zero 2 and MegaMan Zero 4. They attack by trying to run you over. When they die, they grind to a halt, turn transparent and explode instead of simply exploding. In MegaMan Zero 1, they appear in Harpuia's stage, Fefnir's stage and the Pantheon Core stage. In MegaMan Zero 4, they appear in Popla Cocapetri's stage and the Prison where you fight Hell the Giant.