Mega Man 5

Overview
Mega Man returns home one day to find Proto Man kidnapping Dr. Light! Has Proto Man turned evil? Mega Man set's off to find out what's going on.

Mega Man learns that Dr. Wily cloned Protoman when the real Proto Man escapes, and tells him.

Robot Masters

 * Star Man
 * Gravity Man
 * Gyro Man
 * Crystal Man
 * Napalm Man
 * Stone Man
 * Charge Man
 * Wave Man