Tatepakkan

Shield Gun, or Tatepakkan (タテパッカン), is a cannon enemy in Mega Man 5. As the name implies, they have a shield on them. They can only be hit when the shield is up, while they are shooting. They appear in Gyro Man's and Stone Man's stages, and the second Proto Man Castle stage. They also appear in at least three colors but their attacks are the same. They are weak to Super Arrow in Mega Man 5 and Beat in Mega Man IV. In Mega Man 5, the Charge Kick is also a good weapon to use on it as it can go straight through its defense and destroy it with two hits, usually hitting them twice with one attack. In Mega Man IV, Ring Boomerang is able to pass through its defense.

Similar enemies
Enemies similar to Shield Gun.
 * Pakatto 24
 * Tatebo