Geronimo Stilton needed to make The Diamond Propchecy come true.So,Coraline guided him to it.It was presented to him in a beautifully furnished giant pink seashell outside of Coral Academy.It is when two diamonds,one red and one blue,unite together to create ultimate power.But,Queen Cackle wanted to steal The Royal Shapprie to give her ultimate power.Geronimo Stilton once again needed to stop her.

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