At first glance, the room the player enters appears seemingly empty, until the stain glass in the background breaks and forms into a living cluster of glass shards that seeks the player until they are disposed of. During the battle, sections of the stain glass will break, scattering in the air before forming into a small cluster of glass shards slowly seeking the player. Its best to find a safe opening before the glass shards before the debris can hit the player before forming in the small glass clusters. When the glass cluster is formed, stay away from it as much as possible. After each cluster of glass shards is destroyed, the glass clusters will gradually move faster and faster as the Poltergeist becomes closer to defeat. This process is repeated throughout the battle. When the Poltergeist reaches Desperation Mode, the smaller glass clusters will form in a way that the debris will hit the player if they do not take the necessary maneuvers to avoid them. After the stain glass in the background is completely broken, it would appear that stain glass is completely broken, but the frame of the stain glass in the room will break and form into one large glass cluster that is much stronger than the smaller clusters and will seek the player very quickly.
- The Poltergeist is a marriage of the Stain Glass Ghost from Castlevania Chronicles and Picopico-Master from Mega Man 2. Interestingly, its Japanese name, Picopico Glass, also comes from Picopico-Master's name as well.