The Slider Robot is a giant vacume robot with a head. It is the third boss in Castlevania: Rusalka's Revenge.
The Slider will slowly roll torwards you, stopping occasionly to use it's head to attack you. (rolling it on the floor) It will change direction soon enough and move backwards. It can shoot lasers and fireballs in this phase. When it reaches half damage, it can jump, or shoot cannonballs. As a final ditch attack, it can over load the stadium with fire pillars that slowly move across the stadium. Before it happens, specks of flame appear, and you must get between two and avoid them. It has 2000 HP.