Thunder Cannon (サンダーキャノン Sandākyanon) This is a point defense mechanism installed outside and within Major's control room. Thunder Cannons are normally contained within their green shielded domes but they're not immune to even the Psy Bits. When they detect an enemy, the shielded dome opens to reveal a laser-firing cannon.
Appearances[]
It's encountered in Floating Continent and Core of the Planet.