The Shiny Stone in Super Mario RPG holds a secret – it's the key to unlocking a hidden boss battle.
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If you got a shiny stone, Here is how to use it
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Visit the Item Shop in Monstro Town and interact with the black door without entering. A message will pop up, indicating that the door has been "sealed."
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But, If you have the Shiny Stone, a message will appear: "Look! The Shiny Stone is reacting! The seal has been broken!" Following this, the door will open up.
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Face Super Mario RPG's secret boss, Culex, beyond the door. Prepare for a tough battle by leveling up or strategically using items.
Culex is a divine being in Super Mario RPG, characterized by a muscular purple body, powerful claws, red and gold wings, and a lower body encased in blue crystals.
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