Dr. Cossack

Mikhail Cossack is the main antagonist in Megaman 4. He sent a letter to Dr. Light chalenging Megaman to defeat his Robot Masters, claiming that he would prove to the world tht he was the greatest robotic scientist in the world. After defeating Cossack's robots, Megaman rushes to Cossack's citadel in Siberia, where he meet de doctor and fight him. However, before the batle had a conclusion, Protoman interrupts both along with Cossack's daughter, Kalinka, who was kidnapped by Dr. Wily. Wily was using Cossack for his mad schemes. Ater Wily is dfeated, Cossack joins Dr. Light and gives Megaman a bird robot named Beat