Kakinbatank

Kakinbatank (カキンバタンク) is encountered in first Wily stage in Mega Man 9. It's a large robot on treads and initially holding a shield. When disturbed, it will attempt to crush the player with its shield. After that it starts shooting. Since it's a large-sized enemy, it's resistant to Black Hole Bomb and Tornado Blow. However, Laser Trident can pass through its shield. Kakinbatank has red and green versions, both of them appear in first Wily stage.